Week 12

Q: 1 & 2 What was the most difficult assessment item you completed in COIS20025 this term (not counting the examination which is not until the examination period)?  What was difficult about it and how would you suggest it could be improved?

                Among all the assessments, the most difficult assessment according to me is assessment 3. Maintaining a weblog and posting a blog every week is more difficult, it takes more time and we need more efforts to complete this assessment than the other two assessments. Though the overall marking criteria for assessment 3 are 10%, it is a difficult job for particularly reminding in posting the blog every week. Although I felt it bit difficult, I should tell the benefits of this assessment and how it is helped me to complete the other two assessments. The current weekly questions are related to the topics in assessment 1 and assessment 2 and it is very much helpful in completing the other two assessments. The improvement I suggest is that it is good to have the questions relating to Object-oriented approach. So that it is helpful for research in Academic essay of assignment 2.

Q:3 Name three (3) things you learnt this term in COIS20025.

                Traditional approach to System development: It consists of series of phases known as System Development Life Cycle (SDLC). They are System planning, System analysing, System Design, System Implementation.                                                                                                                                                                       Fact-Finding Techniques: It consists of Interviews, Document review, Observations, Questionnaires and surveys, sampling, research is useful to collect the information.

                Enterprise Modelling tools: The most popular tools are Entity Relationship Diagrams (ERD) which shows the logical relationships in the system entities and Data Flow Diagrams (DFD) which converts input data into useful information.

Q:4&5 What career are you working towards?  How will you be able to use the knowledge and skills learnt in this course in your future career?

                                     This course gives a basic knowledge about how to be a good System analyst. The skills involved in this course are Data design, Object Modelling, Process Modelling, Data Modelling, System Implementation, Enterprise Modelling and Types of System Maintainance Techniques. Some of the System analyst tool kits involved in this course is Computer-Aided Software Engineering(CASE) tools, Object-oriented tools, Project management tools.

References:

  Referenced Book: System Analysis And Design 7th Edition, Thomson course Technology Boston.

Author: Shelly, G, Chasman, T & Rosenblatt

                       In this book, Shelly explains the structured analysis in all stages which helps to explain about the traditional approach to system development in detail and to describe it in the essay. Though, it helps me to get a clear idea about the traditional approach. Object-Oriented approach to system development is discussed briefly, which helps to get only a brief idea about Object-Oriented approach. However, to compare and contrast these approaches, understanding of both the approaches is required.

week 10

THE FOUR MAINTENANCE TASKS ARE:

                      1.CORRECTIVE MAINTENANCE

                      2.ADAPTIVE MAINTENANCE

                      3.PERFECTIVE MAINTENANCE

                      4.PREVENTIVE MAINTENANCE

The four maintenance tasks used in the small business press’s in the new ARCIS are:

1.CORRECTIVE MAINTENANCE:-

                                      The corrective maintenance diagnoses and it fix logic errors.It refers defective network cabling.The best maintenance approach is a scaled down version of the sdlc itself,where the investigation ,analysis before implementing the solution.In this requests receive a high priority and a maintenance team begins work on the problem immediately.In small business press’s new ARCIS the corrective maintenance fixes the problems and they debug the code of the program and then update the software required.

2.ADAPTIVE MAINTENANCE:-

                         Adaptive maintenance adds enhancements to an operational system and makes system easy.An enhancement is a new feature and this maintenance is similar as corrective maintenance.A major adaptive maintenance program is like a small business press new sls because  the development method is same.And in this press this maintenance creates new reports.

3.PERFECTIVE MAINTENANCE:-

                                       This maintenance changes the operational system to make it more efficient and reliable.It also can improve system reliability.In the small business new ARCIS ,a system is easier to maintain ,support is less costly.This maintenance is less valuable in its benefits if the press already plans to discontinue the system.In a small business press if the system uses perfective maintenance the analysts use a technique called software engineering.

4.PREVENTIVE MAINTENANCE:-

                                     In a system ,it solves the problems,this maintenance requires analysis of areas where trouble is likely to occur.This maintenance often occurs when in an increased user satisfaction and reduced downtime.In this small business this maintenance tightens all the required cable connections.

Week 9

The four methods for changing over from one information system to another are:

                1.Direct cutover

                2.Parallel

                3.Pilot

                4.Phased

 

1.DIRECT CUTOVER:- In this the new system is installed and quickly brought to operational status.It is also sometimes called immediate cutover and this method is simple.Because the old and new system arent operated in parallel.The main disadvantage with this method is its risk.Because older system are not operated in parallel.Direct cutover is typically used under the new system is not replacing an older system.coming to CHIS in older system the health centres maintain records manually and if the records were lost then the details will be lost.

2.PARALLEL:-The parallel operation method that operates both the old and new systems for an extended time period.In this method the old system ideally continues to operate until the new system has been thoroughly tested and to be error-free and ready to operate independently.With this method in health centres should note all the details regarding the visit of the child before the child visits for the treatment.This parallel is generally best when the consequences of a system failure are severe.

3.PILOT:-The pilot method involves in implementing the new system at a particular place.This method is less cost than a parallel.It is a combination of both direct cutover and parallel.The system in CHIS with this pilot method the health centres should note all the details before and they should store them in old and systems.

4.PHASED:-In this method the system is installed and brought into a series of phases.The new system will operate the existing systems multiple and the new system replaces the two existing systems.The main disadvantage with this method is reduced risk.

Week 8

Shelly,G,Chasman,T & Rosenblatt,H 2007,System analysis and design,7th edition,Thomson Course Technology,Boston.

                 In this book author explains in detail various approaches to development of information system .It explains in detail traditional and object oriented approach of system analysis and design. It also compares the traditional and object oriented approaches .It also explains many design models like DFD’s Data dictionaries, ERD’s , etc many more that help  the designing a model for the business requirement in an organization. These are the methods used by traditional approach. ,

Week 7

1. Name one way that the traditional and object oriented approaches to information system development are similar. Explain how they are similar?

The traditional approach in information system is it is a collection of processes. And these processes interact with data entities. When the system does in response to an event, the tradition approach includes processing models.

The traditional approach and object oriented approaches to information system development are similar in research method. Because in research method both the approaches are similar in finding the objects (or) processes collecting from the newspapers, websites and articles. But in traditional approach the system collects all the processes. But in object oriented approach the system collects all the interacting objects. In this way they are similar to information system development.

2. Name one way that the traditional and object oriented approaches to information system development are different. Explain how they are different?

The traditional and object oriented approaches differs in what happens when an event occurs. The traditional approach differs from the object oriented approach in the way the system in which it is implemented. In traditional approach the system is a collection of processes but in object oriented approach the system is a collection of interacting object. But in traditional approach the processes interacts with data entities But in objects oriented approach the objects interact with people and each other. In this way they are different to information systems development.

Week 5

write a data dictionary entry for aprocess from the diagram 0 dfd that you drew in week4

use the following headings:

* process name
* process number
* purpose
* input data flows
* output data flows
* process description
* notes

1. Process Name:- the process name is nothing but as it appears on the dfd’s.

In the o dfd the process name is Accept order.It takes order from the customer.

2.Process number:- The process number is nothing but it identifies the process and indicates relationships.The process number for accept order is 1.0.

3.Purpose:-It is nothing but it accepts the order and order details from the customer and it processes the order and then it performs.

4.Input dataflows:-The standard DFD names for the input data flows to the entity.The input dataflows is order details.The system takes the order details from the customer and checks whether the dvd is there or not.

5.output dataflows:-The standard DFD names for the data flows leaving the entity.The output dataflows is order.The process system takes the order from the customer and performs the generating dvd process.

6.Process Description:-The process description includes the input and output data flows.The process description also documents the steps and the logic of the system.This process description includes structured english, decisiontablesand decision trees.

The structured english is nothing but it looks like programming statements.The structured english for the process name is get new order from customer if order confirm then generate the dvd else nodvd is available end.

THE DATA DICTIONARY ENTRY FOR SECOND ENTITY:

1. Process name:-The process name for the second entity is CHECK DVD.In this it checks whether the dvd is there or not.
2. Process number:-The process number for check dvd is 2.0.
3. Purpose:-The purpose is it takes the order from the customer ,generates the process and checks whether the dvd is there or not.
4. Input data flows:-The DFD names for the input data flows to the entity.In this the input dataflows for the check dvd is status message.It takes the order from the customer and if confirm the order then it gives status message.
5. Output data flows:-The DFD names for the output data flows is order details,confirm order,customer details and modify the steps.

Process description:-The process description is nothing but it gives brief description of the record.In the process description the higher level process contains a lower level processes.The lower level processes may in turn be further decomposed into sub lower level DFD’s.

Week 4

 

 

 

Week 3

1. what  is the traditional approach to systems development?

2.what is the object oriented approach to systems development?

3.what text books,journals and/or websites might be useful to search for articles about comparing and contrasting the traditional and object  oriented approaches to systems development?

Following are the various fact finding techniques for the above,which might vary with each approach

·       Document review

·       Observation

·       Questionnaires and surveys

·       Sampling

·       Research

With the traditional approach to systems development , document review is the first and foremost technique in finding the facts.document review is nothing but it is a plan to implement a project and it explains how the system works and then the observation is also used to verify the statements or queries to implement in systems development.In traditional approach the questionnaires and surveys doesnot satisfy because in this we will discuss a lot about how the projects are going but in this we cant implement this technique.In traditional approach we will take some records,files to perform the project

So in this sampling is satisfied.And finally research is satisfied because in traditional approach we also get the information through mails,news and books.These are the fact finding techniques that support traditional approach to systems development.

As with object oriented analysis where as the processors and data are treated as separate components,the only fact finding technique used for this approach is research only.Where research identifies an issues own properties and inherited properties for example the person class includes the student objects in which we will identify the characteristics.The research technique is effectively used in sending information between objects.None of the other fact finding techniques are useful for the object oriented approach to systems development , with document review because in this we use only how to plan but in object oriented this we cant plan anything we simply implement a program through the object oriented programming languages.And similarly with observations,questionairesand surveys,sampling the object oriented analysis approach to systems development doesnot satisfy the fact finding techniques.In object oriented approach to systems development we satisfy onlyresearch technique the remaining all is not satified.

The fact finding technique that is used to find the textbooks,journals,website we mostly use the questionnaires and surveys,research techniques.In this we use how to find the sites  about the information regarding the systems development in traditional approach and object oriented approach.In this these are the fact finding techniques that are mainly used in traditional approach and object oriented approach to systems development.

Week 2

1. What are the current problems with the The Alwyn Residential College Information System (ARCIS) ?

                                     Currently  problems are multiple binders  keep tracking the college system  and housing owned by private citizens. so the current system haven’t proper housing listing and it is difficult to maintain keep up-to-date the infirmation.

    2.  What information do you need to find out about the The Alwyn Residential College Information System (ARCIS) to develop a detailed understanding of the current system?

                                            The system separate binders three catogories are undergraduate, graduate, and faculty/staff listings. Within each binder are copies of listings available to a particular group. Every listing are generated by the college housing office from their own housing units. type of housing (apartment, house, unit, etc.), number of bedrooms, number of bathrooms, other rooms, disabled access, other features, rent, security deposit, utilities (telephone, electricity, water and gas).