CIS 315 – Hatim Mouissa Chapter 1 Introduction to Sys.docx
- 1. CIS 315 – Hatim Mouissa Chapter 1: Introduction to Systems Analysis and Design CIS 315 – Hatim Mouissa Objectives development life cycle and its four phases. development methodologies. its extensions. project team.
- 2. SYSTEMS DEVELOPMENT LIFE CYCLE CIS 315 – Hatim Mouissa Systems Development Life Cycle Planning Analysis Design Implementation We will explore each phase in detail in the next slides CIS 315 – Hatim Mouissa SDLC: Planning 1. Project Initiation ◦ Develop a system request ◦ Conduct a feasibility analysis 2. Project Management ◦ Develop work plan
- 3. ◦ Staff the project ◦ Control and direct the project Why should we build this system? CIS 315 – Hatim Mouissa SDLC: Analysis 1. Develop analysis strategy 2. Gather requirements 3. Develop a system proposal What should the system do for us? Where and when will it be used? CIS 315 – Hatim Mouissa SDLC: Design 1. Develop a design strategy 2. Design architecture and interfaces 3. Develop databases and file specifications 4. Develop the program design How will we build the system?
- 4. CIS 315 – Hatim Mouissa SDLC: Implementation 1. Construct system 2. Install system ◦ Implement a training plan for the users 3. Establish a support plan Build the system! CIS 315 – Hatim Mouissa Putting the SDLC Together specific deliverables refinement go back into a planning phase for its next revision, a follow-on system, or
- 5. maintenance releases CIS 315 – Hatim Mouissa Processes and Deliverables Process Product Planning Analysis Design Implementation Project Plan System Proposal System
- 6. Specification New System and Maintenance Plan SYSTEMS DEVELOPMENT METHODOLOGIES CIS 315 – Hatim Mouissa Systems Development Methodologies implementing the SDLC -known methodologies include: ◦ Waterfall development ◦ Parallel development ◦ Rapid application development ◦ Agile development
- 7. CIS 315 – Hatim Mouissa Categories of Methodologies • Structured Design –Waterfall Development –Parallel Development • Rapid Application Development –Phased –Prototyping –Throwaway Prototyping • Agile Development –eXtreme Programming CIS 315 – Hatim Mouissa Structured Design 1 Waterfall Development
- 8. CIS 315 – Hatim Mouissa Structured Design 2 Parallel Development CIS 315 – Hatim Mouissa Rapid Application Development 1 Phased Development CIS 315 – Hatim Mouissa Rapid Application Development 2 System Prototyping CIS 315 – Hatim Mouissa Rapid Application Development 3 Throwaway Prototyping CIS 315 – Hatim Mouissa Agile Development
- 9. Extreme Programming CIS 315 – Hatim Mouissa Selecting the Right Methodology Usefulness for Waterfal l Paralle l Phased Prototypi ng Throwawa y Prototypi ng Extreme Programmi
- 10. ng Unclear user requirements Poor Poor Good Excellent Excellent Excellent Unfamiliar technology Poor Poor Good Poor Excellent Poor Complex systems Good Good Good Poor Excellent Poor Reliable systems Good Good Good Poor Excellent Good Short time schedule Poor Good Excellent Excellent Good Excellent Schedule visibility
- 11. Poor Poor Excellent Excellent Good Good CIS 315 – Hatim Mouissa Object-Oriented Analysis & Design process ML) ◦ Use-case Driven ◦ Architecture Centric ◦ Iterative and Incremental THE UNIFIED PROCESS CIS 315 – Hatim Mouissa The Unified Process when and how to use the various UML
- 12. techniques for object-oriented analysis and design -dimensional process consisting of phases and flows ◦ Phases describe how the system evolves over time ◦ Workflows are collections of tasks that occur throughout the lifecycle, but vary in intensity CIS 315 – Hatim Mouissa The Unified Process CIS 315 – Hatim Mouissa Unified Process Phases CIS 315 – Hatim Mouissa
- 13. Engineering Workflows g CIS 315 – Hatim Mouissa Supporting Workflows structure management* * Part of the enhanced unified process
- 14. THE UNIFIED MODELING LANGUAGE CIS 315 – Hatim Mouissa Unified Modeling Language - oriented terms and diagramming techniques rich enough to model any systems development project from analysis through implementation groups: ◦ Structure diagrams ◦ Behavior diagrams CIS 315 – Hatim Mouissa UML Structure Diagrams nd static
- 15. relationships in an information system ◦ Class ◦ Object ◦ Package ◦ Deployment ◦ Component ◦ Composite structure CIS 315 – Hatim Mouissa UML Behavior Diagrams instances or objects that represent the business information system – Activity –Sequence – Communication – Interaction overview –Timing
- 16. – Behavior state machine –Protocol state machine, – Use-case diagrams CIS 315 – Hatim Mouissa Summary Unified Process is a two-dimensional systems development process described with a set of phases and workflows is a standard set of diagramming techniques KoKo’s Canine Pet Club CASE BACKGROUND
- 17. About a year ago, Christina Magana found herself facing a dilemma. As a result of a chronic illness, KoKo, her beloved schnauzer, required medication, a special diet, and daily exercise. While the medication and special diet were easy to accommodate into a busy life style, ensuring that KoKo received daily exercise was another matter. Although KoKo’s daily exercise usually took the form of a walk around the neighborhood, Ms. Magana, as a busy executive, had trouble scheduling KoKo’s daily walks. Ms. Magana’s friend Ian, would walk KoKo on the days when Ms. Magana was extremely busy. Ms Magana’s friends and neighbors liked the pet walking idea so much that they approached Ms. Magana and Ian about walking their dogs as well. What began as a neighborhood walking service has now become a fledgling, yet growing, metropolitan area business. Ms. Magana has hired you to build a simple yet effective software program for her business. She needs the system to be able to track data about clients, pets, walkers, and schedules for when the walkers take out the pets. Although the service was only started six months ago, it
- 18. currently provides pet walking services for 350 pets and is registering on average 5 pets per week. Paperwork is increasing and the owner needs a better record keeping system. During a meeting with the owner she explains to you that a new client must register with the service. During the registration process the new client provides basic information about his pet. Chooses a preferred walk time and specifies a walker preference. During this time a dog walking fee is determined and recorded on the pet registration form. The dog-walking fee varies by pet and is based on the pet’s size, temperament and the number of pets the owner has. The pet owner can request that his pet be walked in the early morning, late morning, early afternoon, late afternoon, or early evening hours. Available walk times are currently kept on a clipboard by the phone. However, Ms. Magana wants the available walk times, as well as walker, client, and pet information, kept in the system that you are building. Everything now is done on pre-printed paper forms. Because the business grew so fast Ms. Magana has contracted
- 19. 20 walkers with alternating schedules. She has also hired three full-time college students to help with the record keeping and organization of the files. She is also renting a small storage unit when she keeps all the extra files that she is not able to keep at home. Below are the recurring costs that she is currently paying. As well as the benefits that she anticipates gaining by using the newly developed system. She would like to be able to see how the new system will operate as it is being built because she wants to be able to make some modifications to it at each stage.. 1 Benefits Benefit Approximate Dollar Value Insurance Savings $200 Storage savings $8,000 Staff Reduction (1 less person) $1,000 Increased Business $2,000 Faster Processing $1100 Total Costs Development Costs One Time Cost Approximate Dollar Value
- 20. 1 Server $3,000 2 New Workstation @ 1,250 $2,500 1 Printer / Fax / Copier Machine $1,200 1 Server Software $300 2 Workstation Software @ 250 $500 Development Labor $9,000 Total Costs Operational Costs Cost Approximate Dollar Value Hardware $950 Software $450 Operational Labor (maintenance) $1,500 Total Costs Assume that the interest rate used to calculate PV is 4% Assume that the increase in business will be 6% each year. Assume that the operational cost of the system will increase by 2.5% each year
- 21. 2 DELIVERABLES FOR PROJECT 1 justify your answ DELIVERABLES INSTRUCTIONS gnment as the first page in your binder turn in the assignment
- 23. 3 Course: Assignment: Student Name: CIS 3150 –Introduction to Systems Analysis and Design Project 1 ____________________________________________
- 25. 4 Sheet1Cost-Benefit Analysis20192020202120222023TotalIncreased Business$ 2,000$ 2,120$ 2,247$ 2,382$ 2,525Insurance Savings$ 200$ 200$ 200$ 200$ 200Storage savings$ 8,000$ 8,000$ 8,000$ 8,000$ 8,000Staff Reduction (1 less person)$ 1,000$ 1,000$ 1,000$ 1,000$ 1,000Faster Processing$ 1,100$ 1,100$ 1,100$ 1,100$ 1,100TOTAL BENEFITS:$ 12,300$ 12,420$ 12,547$ 12,682$ 12,825PV OF BENEFITS:$ 11,827$ 11,483$ 11,154$ 10,841$ 10,541PV OF ALL BENEFITS:$ 11,827$ 23,310$ 34,464$ 45,305$ 55,846$ 55,8461 Server$ 3,000.00$ - 0$ - 0$ -
- 26. 0$ - 02 New Workstation @ 1,250$ 2,500.00$ - 0$ - 0$ - 0$ - 01 Printer / Fax / Copier Machine$ 1,200.00$ - 0$ - 0$ - 0$ - 01 Server Software$ 300.00$ - 0$ - 0$ - 0$ - 02 Worstation Software @ 250$ 500.00$ - 0$ - 0$ - 0$ - 0Development Labor$ 9,000.00$ - 0$ - 0$ - 0$ - 0Total Development Costs:$ 16,500.00$ - 0$ - 0$ - 0$ - 0Hardware$ 950$ 974$ 998$ 1,023$ 1,049Software$ 450$ 461$ 473$ 485$ 497Operational Labor (maintenance)$ 1,500$ 1,537$ 1,576$ 1,615$ 1,656Total Operational Costs:$ 2,900$ 2,972$ 3,047$ 3,123$ 3,201Total Costs:$ 19,400$ 2,972$ 3,047$ 3,123$ 3,201PV of Costs:$ 18,654$ 2,748$ 2,709$ 2,670$ 2,631PV of All Costs:$ 18,654$ 21,402$ 24,111$ 26,780$ 29,411$ 29,411Total Project Benefits-Costs:$ (7,100)$ 9,448$ 9,500$ 9,559$ 9,624Yearly NPV:$ (6,827)$ 8,735$ 8,446$ 8,171$ 7,910Cumulative NPV:$ (6,827)$ 1,908$ 10,354$ 18,525$ 26,435Return on Investment:89.88%Break-Even Point:1.78Intangible Benefits:This service is currently provided by competitors improved customer satifaction.