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    Friday, October 4, 2019

    Training management System of Sericulture Research and Training Institute

    Software Engineering & Information System Design Sessional 
    ECE 3118
    Training management System of
    Sericulture Research and Training Institute

    Table of content
    CONTENTS
    Abstract          
    Chapter 1
    Information gathering
    1.1              Introduction
    1.2              History
    1.3              Review of written documents
    1.4              Onsite observation
    1.5              Interviews
    1.6              Questionnaires
    1.7              Conclusion
    Chapter 2
    Data analysis
    2.1              Introduction
    2.2              Policy
    2.3              Vision & mission
    2.4              Strategic objectives
    2.5              Structure of the organization
    2.6              User staff
    2.7              DFD of the existing system
    2.8              Conclusion

    Chapter 3
    Feasibility study
    3.1              Introduction
    3.2              The problem in the existing system
    3.3              Candidate system
    3.4              Criteria performance
    3.5              Conclusion  
    Chapter 4
    Cost-benefit analysis
    4.1                      Introduction
    4.2                      Net benefit analysis
    4.3                      Payback analysis
    4.4                      Cost identification
    4.5                      Present value analysis
    4.6                      Conclusion

    Chapter 5
    5.1                          Advantages
    5.2                          Disadvantages
    5.3                          Conclusion





                           List of figures                      





    Abstract

    Our purpose is analyzing a system and try to develop a computerized system in place of an existing analog system. For this purpose, we chose – Sericulture Research and Training Institute as our platform. As this is also a training center, we have analyzed the training section and employee management section of this institute. We have analyzed the existing system of these sections and gathered information about the existing system by onsite observation and interviewing the staff of SRTI. Afterward, we have proposed a system with a computer-aided system and designed the prototype to make the existing system more user-friendly.
    Overall this project will be developed to help the staff of SRTI to maintain the institute in the best way possible and also to reduce human efforts.


    Chapter 1
    Information gathering

    1.1          Introduction
    1.2          History
    1.3          Review of written documents
    1.4          Onsite observation
    1.5          Interviews
    1.6          Questionnaires
    1.7          Conclusion

    1.1   INTRODUCTION

    The first step in developing a system is information gathering. For this, a clear idea about the existing system is very important. By using different information gathering tools analyst gather information about the existing system. In this chapter, the organization’s history and what information were gathered during the onsite observation and interview is described shortly.

    1.2    HISTORY

    Sericulture Research and Training Institute is an autonomous national research institute that carries out research on sericulture and supports the sericulture industry. Sericulture Research and Training Institute located at Rajshahi, the institute is under the control of the Sericulture Board.
    The institute traces its origins to the Silk Institute that was established in Rajshahi on 3 January 1962 comprising two units: Silk cum lac research institute and Silk technological institute under the East Pakistan Small and Cottage Industries Corporation.
    Following national independence, the institutes were merged to form Silk Research and Training Institute in 1974. Now renamed the Sericulture Research and Training Institute. The institute is the only one in Bangladesh specializing in silk research. It has developed a number of high yielding Mulberry plant cultivars and silkworms.
    The government separated SRTI from BSB and established an independent institute through the act no.25 of 2003. The institutes consist of five research sections namely: Mulberry section, Silkworm section, Seri-chemistry section, Seri-pathology section, and one training section. Besides these it has 01 Regional Sericulture Research Center at Chandraghona, Rangamati and 01 Garplasm Maintanance Center at Sakoa, Panchagar.
    system analysis


    Figure 1: Sericulture Research & Training Institute
    The principal objectives of the institute are to innovate and disseminate appropriate technologies, provide support services and create skilled technical manpower for the mass propagation and extension of sericulture in the country.

    1.3    REVIEW OF WRITTEN DOCUMENTS

    They use written documents for many purposes. Some of them are attached to this report at the end of this chapter. [page-6] They are- 
    ·         Admission form for diploma in silk technology
    ·         Service receive form
    ·         Monthly attendance form.
                                                  
    The first form is used by the people who want to apply for the diploma course. They need to fill this form and submit it in person. The second form is for receiving materials/advice/permission to visit etc services. People who want these services use this form. The third form is for recording the attendance of employees of a month. Official employees use this form. SRTI also publish their annual report on their website. We have analyzed the previous year’s report to get a more clear idea about the organization’s progress, objective, mission, the projects they are working on and about their training courses. 

    1.4    ONSITE OBSERVATION

    Sericulture Research and Training Institute is an autonomous national research institute that carries out research on Sericulture (silk farming) and supports the sericulture industry in BD. They also give training to people and create skilled manpower.
    Chairman of sericulture institute runs the system. Important people of the institute are the director. Jamal Uddin Shah, principal scientific officer-Munsur Ali, assistant electrical engineer-Md. Abu Taleb, Senior research officer-Md. Shakhawat Hossain, assistant director-Md. Forhad Hossain.
    Our observation is natural and obtrusive.it is natural as it occurs in a setting when the respondent knows he/she is being observed. It is direct observation as it takes place we observe the subject or system at work.


    1.5    INTERVIEWS

    For determining information requirements we took interviews of some employees. Most of our questions were open-ended. The conversation among us is listed below- 




    Interviewee 1
    Name Md. Shakhawat Hossain
    Designation: Senior Research Officer
    Head of Seri-Chemistry Section 

    Conversation:
    Member: How do you publish the research result of this institute? 
    SRO: Annual report is published through our website. Stakeholders take the information from the website and a copy of the research result is given to the ministry of agriculture.
    Member: Do you use any software-based platform?
    SRO: Yes, we have a software based platform. It is the Annual agriculture research management system. Here we give the research result as input. 
    Member: Does everyone has the access to the website?
    SRO: Yes. Everyone can access the website. 
    Member: How the farmers can get benefited from your research?
    SRO: Mainly our work is developing the technology. The developed technology is discussed in training .Trainee will get the opportunity to learn about new technology. Thus they can apply this in practice when working.
    We also give services through mobile apps. Trainees can get information from mobile apps. We have an SMS based service. We send necessary messages to the farmers when needed.
    Member: In which part of this institute do you find the need for digitalization? 
    SRO: Our employee management system is not computerized and account related (financial management) need-based features should be introduced. 



    Interviewee 2
    Name: Rafia Sultana
    Designation: Senior Training Instructor
    SRT Training Section

    Conversation:

    Member: How many courses do you provide as a part of training? 
    STI: We provide two types of courses. Long term and short term. Again two courses are included in long term. One is post graduate diploma in sericulture and other is diploma in technology.
    Member: What is the time period for short term and long term training?
    STI: Time duration for short term course is 30 days and long term course is one year.
    Member: What type of development has occurred in training section recently?
    STI: The technology has been developed more than before. We contact with the farmers constantly through SMS. We also have an android app through which we can provide important information to the workers when needed.
    Member: How do you reach the workers from distant places?
    STI: We have the information of the people who got training from here. We can reach them anytime from those information.
    Member: Are those information stored in files or in computer?
    STI: We don’t have the trainee section in our website. They are stored in files.
    Member: Do you people give training outside of the institution?
    STI: Yes we do.
    Member: How do you take classes here?
    STI: We take classes by using multimedia, projector. We also show them videos related to their work if needed.

    1.6     QUESTIONNAIRES

    A form with some questionnaires is attached with the report. There are different types of question in the form such as-Fill in the blank, dichotomous, ranking scale, MCQ questions. 

    1.7     CONCLUSION

    In this chapter all the information were gathered is described. We have collected some important forms from the main office, we’ve learned who & in what purpose they use these forms. We have observed the user stuff relationship, job function, etc. we have taken an interview with some staff of SRTI and gathered the information which is related to the system we want to digitalize.




    Chapter 2
    Data analysis

    2.1         Introduction
    2.2         Policy
    2.3         Vision & mission 
    2.4         Strategic objectives
    2.5         Structure of the organization
    2.6         User staff
    2.7         DFD of the existing system
    2.8         Conclusion




      2.1  INTRODUCTION

    The second step of developing a system is data analysis. The analysis is a detailed study of the various operations performed by a system and their relationship within and outside of the system. As the data are collected they must be organized and evaluated and conclusions were drawn for preparing a report to the user for final review and approval. In this chapter, we have discussed the organization’s goal, policy, objective, structure, the user stuff relation, their job, and how the existing system is working.

    2.2   POLICY

    SRTI is a charitable organization because they provide service (training) to the people. This is also a research center. They work for the development of the sericulture in the country and create skilled technical manpower.

     2.3    VISION & MISSION 

    Vision:
    Converting the organization into a dynamic organization to provide research and development assistance to the organizations concerned with the silk industry & for the development of sericulture in the country.
    Mission:
             Increasing raw silk production through revolution of innovative technology.
             Development of productivity through the use of low-cost technology.
             Provide technical assistance to systematically organize raw silk production process in the country through the creation and expansion of skilled technical manpower.

    2.4     STRATEGIC OBJECTIVES   

    1.      In order to identify the current and long-term science and technology needs of the country and formulate research and development programs for the development of the technology of the country.
    2.      As well as putting emphasis on the increase in production and quality standards, as well as to undertake research programs for the development of low-cost environmentally friendly functioning technologies.
    3.      Creating skilled manpower for the sericulture sector through training.
    4.      Enhance and enhance the effectiveness of transfer and acceptance of invented technologies at the field level.

    2.5     STRUCTURE OF THE ORGANIZATION


    This is the main structure of Sericulture Research And Training Institute. The director runs this institute. There is five research section with 47 members. One chief scientific officer and two principle scientific officers maintain these five sections. In the training section, there is 21 people in total. 1 chief instructor, 2 Sr. instructor, 3 instructors are important persons in this section. From this the structure we got the primary idea about the organization. (Document attached)
    [Source: SRTI annual report 2016-2017]

    2.6     user staff

    i)        Director:
    Authority relationship: The responsibilities of the board and director of the system may overlap.
    Job function: Acts as technical advisor of the system. Hire and direct subordinate staff or members.
    Information requirements: The director receives a written job description and evaluates the work in a constructive way.
    Interpersonal relationships: He is related to the subordinate staff members of the system.

    ii)      Assistant engineer:
    Authority relationship: Maintains a relationship with the superiors and others in the engineering department.
    Job function: He provides assistance and support as needed to manage various engineering and administrative activities.
    Information requirements: He assembles necessary information such as plans specification, agreements, etc.
    Interpersonal relationships: He is related to consulting engineers, contractors and outside agencies.

    iii)    Assistant director:
    Authority relationship: Supports the director in system planning and monitoring process.
    Job function: Assists in developing and implementing plans and goals for the system.
    Information requirements: Receives information about budgets and expences and maintain scheduling of events.
    Interpersonal relationships: Related to the director coordinate and supervise daily operations.

    iv)    Accounts officer:
    Authority relationship: Accounts officer is related to the process for allotting the necessary amount of money needed to run the process.
    Job function: He prepares bills for paying money to the contractor.
    Information requirements: He gets an order to allow a fixed amount of money.
    Interpersonal relationships: He directly relates to the director and assistant director.
    v)      Chief Instructor:
    Authority Relationship: Working as part of a team to provide an enjoyable and safe training experience for guests of all ages and abilities, following the SRTI program.
    Job Functions: To manage all aspect of the delivery of the training program in accordance with SRTI procedure
    Information Requirements: Approachable, friendly, and enthusiastic. Also able to find the candidate who can complete the training course
    Interpersonal Relationships: Able to communicate with the staff of all ages, self-motivated, flexible, and welcoming.
    vi)    Sr. Res. Office (MULBERRY):
    Authority Relationship:  Plan, organize and supervise laboratory and field research activities with the objective of conducting high-quality implementation.
    Job Functions: Appropriate  pruning system and schedule for both productive and unproductive mulberry plants have been developed to improve the productivity of quality leaf and to maintain the plant to its optimum shape, size, and height.
    Information Requirements: Guide team members on complementation of tasks, activities, reports, and documents.
    Interpersonal Relationships: He is very co-operating with the sub-ordinate and makes a healthier environment for the corresponding stuff.

    vii)   Sr. Res. Office(SILKWORM):
    Authority Relationship: The practice of breeding silkworm for the production of raw silk. Research is focusing on the genetics of silkworms and the possibility of genetic engineering.
    Job Functions: The purpose is the commercial caterpillar of the domesticated silk moth, which spins a silk cocoon that is processed to yield silk fiber.
    Information Requirments:  Eggs take about 14 days to hatch into larvae, which eat continuously. After they have molted four times, their bodies become slightly yellow and skin becomes tighter.
    Interpersonal Relationships: His personality is also very moderate to control his sub-ordinate and bring the best outcome from them.

    2.7     DFD OF THE EXISTING SYSTEM  

    DFD

    Figure 3: DFD of the exiting training system of SRTI

    Describing data structure:
    Name of data structure:
    User’s application:                   
    Data elements  
    mandatory
    optional
    access specifier
    User name
                *


    Gender 
                *


    Age 
                *

    Private 
    Email 
                *

    Private
    Contact-no
                *

    Private
    Educational background
                *  


    Address

              *
    Private


    Verification ok:
    Data elements 
    Mandatory 
    Optional 
    Access specifier 
    Name 
               *


    Contact-no 
               *

    Private 
    Educational background
               *



    Selecting course:
    Data elements 
    Mandatory 
    Optional 
    Access specifier 
    Course name
               *


    Course type      
               *



    User’s history:
    Data elements 
    mandatory
    optional
    Access specifier
    User name
                *


    Gender 
                *


    Age 
                *

    Private 
    Email 
                *

    Private
    Contact-no
                *

    Private
    Educational background
                *  


    Address

              *
    Private

    Certificate:
    Data elements 
    Mandatory 
    Optional 
    Access specifier 
    Name 
                *


    Course type
                *


    Grade 
                *



    Describing data element:
    User name:
                  first name
                  last name

    Gender:
                  male
                  female Age:
                  Date of birth Contact-no:
                  Mobile number
                  Phone number
    Educational background:
                  SSC (science)
                  HSC (biological science) Address:
                  Current address
                  Permanent address  Course type:
                  Long term course
                  Short term course  Grade:
                  First-class
                  Second class
                  Third class

    Describing process:
    Name of the process: 
    Verify
    Input
    Logic
    Output
    Educational background
    Match with user’s information
    Ok

    Generate certificate:
    Input
    Logic
    Output
     Checking information

    Ok




    Describing data flow and data store:
    Data flow:
    Data flow
    Comment
    User application
    From user to verify process

    Data flow
    Comment
    Checking information
    From the data store of educational background to verify process


    Data flow
    Comment
    Verification ok
    From verifying to granted for training

    Data flow
    Comment
    Selecting a course
    From training to certificate


    Data flow
    Comment
    Certificate
    From generating a certificate to user and trainee information

    Datastore:
    Datastore
    comment
    Educational background
    Stored for verifying user’s application

    Datastore
    comment
    Trainee information
    Stored for trainee list of the institute

    2.8   CONCLUSION

    In this chapter, all the data are analyzed and then important information about the existing system is collected. Thus we can get a clear understanding of the existing system. At last, we have selected one system which we’ll try to digitalize. 




    Chapter 3
    Feasibility study
    3.1                       Introduction
    3.2                       The problem in the existing system
    3.3                       Candidate system
    3.4                       Criteria performance
    3.5                       Conclusion


             

    3.1     INTRODUCTION

    After gathering information and data analysis, comes the feasibility study. To do a feasibility study we need to consider the economic, technical and behavioral factors in system development. By determining exactly what the candidate system is to do by defining its expected performance. Thus a feasibility study is carried out to select the best system that meets performance requirements from the alternatives.

    3.2     problems in the existing system

    We’ve selected the Training system of SRTI. In the existing training system, every work is done and managed in an analog file system. Interested people need to go there personally to learn about the training program and all other necessary information. If someone wants to get admitted they need to fill up the forms and submit it. After the admission process is completed they can start the training process. But in this way, people from different districts can’t take part in the training program because of the long distance. But if they had an online training system people could take classes from home and they could come once or twice a week for practical learning. Or they can download the tutorial online later. This way many people can learn the process and work at their own farm. Many jobless people can be stable in their life. This will greatly affect the economic status of our country. In the SRTI training system there is a requirement for the people who are interested in taking the training (Such as- they must have biology in SSC, etc.) because of the limitation of capacity and other necessary equipment. But this problem can be solved by this online teaching system. This can help many young unemployed people in our country.

    3.3     Candidate system

    In this step of feasibility analysis, we present our candidate system for the SRTI training system. This step identifies the candidate systems that are capable of producing the outputs.
    Besides the existing system, there is a new and better way to do the job that will benefit the user. The candidate system is given below.

    DFD ,data flow diagram

    Figure 4: DFD of the candidate system (Training system on SRTI)
    There are some limitations in the existing systems which are trying to be removed in candidate system. We introduce an online class in this candidate system. We don’t need to change the whole system, just a little change in some parts is needed. It is difficult for some trainees to attend the regular class because of the distance and some other reasons. So it will be easier for them to participate in class online. They can watch class-related videos on the website. It will also save costs and time. The system requires technical feasibility.


    Describing data structure:
    Name of data structure:
      User’s application:                        
    Data elements
    mandatory
    optional
    User name
                *

    Gender
                *

    Age
                *

    Email
                *

    Contact-no
                *

    Educational background
                * 

    Address

              *

    Verification ok:
    Data elements
    Mandatory
    Optional
    Name
               *

    Contact-no
               *

    Educational background
               *


    Selecting course & method:
    Data elements
    Mandatory
    Optional
    Course name
               *

    Course type
               *


    Online class:
    Data elements
    Mandatory
    Optional
    Class name
               *

    Number of class
               *


    User’s history:
    Data elements
    mandatory
    optional
    User name
                *

    Gender
                *

    Age
                *

    Email
                *

    Contact-no
                *

    Educational background
                * 

    Address

              *

    Certificate:
    Data elements
    Mandatory
    Optional
    Name
                *

    Course type
                *

    Grade
                *


    Describing data element:
    User name:
    ·         first name
    ·         last name

    Gender:
    ·         male
    ·         female
    Age:
    ·         Date of birth

    Contact-no:
    ·         Mobile number
    ·         Phone number
    Educational background:
    ·         SSC (Science)
    ·         HSC (biological science)
    Address:
    ·         Current address
    ·         Permanent address
    Course type & method:
    ·         Long term course
    ·         Short term course
    ·         Online  class
    Grade:
    ·         First-class
    ·         Second class
    ·         Third class

    Describing process:
    Name of the process:
    Verify
    Input
    Logic
    Output
    Educational background
    Match with user’s information
    Ok

    Participating online class
    Input
    Logic
    Output
    Attending online class
    Match with user’s information
    Ok

    Generate certificate:
    Input
    Logic
    Output
     Checking information

    Ok




    Describing data flow and data store:
    Data flow:
    Data flow
    Comment
    User application
    From user to verify process

    Data flow
    Comment
    Checking information
    From data store of educational background to verify process


    Data flow
    Comment
    Verification ok
    From verify to granted for training

    Data flow
    Comment
    Selecting course & method
    From training to online class

    Data flow
    Comment
    Online class
    From training to certificate

    Data flow
    Comment
    Certificate
    From online class to user and trainee information

    Datastore:
    Datastore
    comment
    Educational background
    Stored for verifying user’s application

    Datastore
    comment
    Trainee information
    Stored for trainee list of the institute

    3.4     Criteria performance
    Performance
    Weighting factor
    Existing system
    Candidate system


    rating
    score
    rating
    score
    System accuracy
    5
    3
    15
    5
    25
    User-friendly
    4
    2
    8
    5
    20
    Response time
    3
    2
    6
    4
    12
    Efficiency
    3
    3
    9
    4
    12
    Data security
    4
    2
    8
    5
    20
    Acceptability
    4
    3
    12
    4
    16



    58

    105

    We can see from criteria performance that the value of the candidate system is more than the existing system. So we can definitely say that the candidate system is far better than the existing system and it can be recommended.
    3.5     Conclusion
    The purpose of this feasibility study was to determine the feasibility of various alternatives to digitalize the SRTI training system. We have stated the problems of the existing system and proposed a better candidate system to solve those problems and make it more user-friendly





    Chapter 4
    Cost-Benefit Analysis
    4.1                          Introduction
    4.2                          Net benefit analysis
    4.3                          Payback analysis
    4.4                          Cost identification
    4.5                          Present value analysis
    4.6                          Conclusion
                                          





    4.1                introduction
    Cost-benefit analysis (CBA), sometimes called benefit costs analysis (BCA), is a systematic approach to estimate the strengths and weaknesses of alternatives (for example in transactions, activities, functional business requirements or projects.
    This chapter discusses approaches to developing design recommendations for the end-user. Each approach has costs and benefits that are compared with those of other approaches before a final recommendation is made. The outcome is a system proposal that summarizes the findings of the analysis and states the recommendation for design. 
    4.2                Net benefit analysis
    Cost analysis
                     Year

    Cost         
    1
    2
    3
    4
    5
    Hardware
    40
    0
    0
    0
    0
    Software
    30
    0
    0
    0
    0
    Personnel
    15
    17
    19
    21
    23
    Maintenance
    0
    4
    5
    6
    7
    Operating
    13
    14
    15
    15
    16
    Cost at a year
    98
    35
    39
    42
    46
    Cumulative cost
    98
    133
    172
    214
    260

    Benefit analysis
                    Year

    Benefit
    1
    2
    3
    4
    5
    From report
    25
    25
    25
    25
    25
    Increased seller
    35
    45
    55
    65
    75
    Benefit a year
    60
    70
    80
    90
    100
    Cumulative benefit
    60
    130
    210
    300
    400
    Profit = 400 – 260 = 140
    4.3                payback analysis
    It tells the length of time required for an investment to reach the breakeven point & begin to return a profit.
                           Year
    Taka
    0
    1
    2
    3
    4
    Total increase in sale
    0
    500
    1000
    1500
    1900
    Investment
    -900
    0
    0
    0
    0
    Total increase in cost
    0
    -250
    -320
    -450
    -560
    Corporate  tax
    0
    -90
    -210
    -294
    -378
    Net cost flow per year
    -900
    160
    470
    756
    962
    Cumulative net cash flow
    -900
    -740
    -270
    486
    1448


    Payback period =A+ (B/C)                            
       = 2+270/756                        
       = 2.35                                  
                            



    Here,
    A, last period with negative cumulative cash=2
    B, amount of cash remaining after
    A= |-270|=270
    C, the total amount of cash generated in the following year=756


    4.4             Cost identification
    Tangible and intangible cost: Tangibility refers to the ease with which costs or benefits can be measured. The purchase of hardware and software, personnel training and employee salaries are an example of tangible costs. They are readily identified and measured. Cost that is known to exist but whose financial value cannot be accurately measured is referred to as intangible costs. An employee’s moral problem caused by a new system is intangible cost. This is easy to identify but hard to measure.
    Direct and indirect cost: Direct cost is those with which a dollar figure can be directly associated with a project. The hardware cost, software cost is a direct cost. Maintenance cost can be said as an indirect cost. Direct and indirect cost and benefits are readily identified for tangible cost and benefit respectively.
    Fixed or variable cost analysis: fixed costs are sunk cost. They are constant and do not change. Hardware costs, software costs are fixed costs. Personnel, employee’s salaries, operating costs are a variable cost.

    4.5                present value analysis
    Present value at 4000 at 15% interest at the end of 2nd year is,
    PV=F / (1+i)^n                                                                        here,
         =4000/ (1+.15)^2                                                               F=future value of investment
         =3024.57                                                                            i=interest rate
    n=time

    4.6               conclusion
    This chapter is a detail summary of the investigation that has been carried out. It outlines the options and recommendations. In this chapter, we discuss cost-benefit analysis and payback analysis. In this system, it will take approximately two years to reach the break-even point. By using this information we will know how a candidate system should be designed.








    Chapter 5
    Conclusion
    5.1                          Advantages
    5.2                          Disadvantages
    5.3                          Conclusion
                           






    5.1               advantages  of the candidate system
    The candidate system has many advantages over the existing system. Many people can join the training course and start their own business. This will reduce the unemployment problem in our country which is growing at an alarming rate. Employees manage all the works through a file system which has many problems like redundancy, inconsistency, etc. but in the proposed system information is stored in a database which is more user-friendly and easy to use. This system will save lots of time.

    5.2               disadvantages  of the candidate system
    Although the candidate system has so many advantages, it still has some disadvantages. Such as –as most of the work will be done by computer, the institute will need fewer employees. So those people who are working in those sectors will be jobless. Another problem is they need to learn how to operate the system properly, it may be hard for some of the old employees. 
    5.3                  conclusion
    After many discussions and analysis, we can say our proposed candidate system can be recommended as it is more feasible, efficient and better than the existing one. As the candidate system is online-based, so it’s more user friendly and more accurate. User can find any information through website that’s why it is faster and easier for both user and worker. Data are highly secured and for these benefits the acceptability is more than the existing system. The weighting value of candidate system is also greater than the existing one. So we can recommend this system.

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