System Development

1. Systems Development Life cycle.
   page 208
   1. Planning
      • page 209
      • Critical Path Methodology
        1. Tasks

           Number	Task	Duration	Precedence
           1	Create Schedule	10	-
           2	Buy Hardware	5	-
           3	Program	20	1
           4	Test Code	20	3
           5	Test System	10	4
           6	Installation	10	2
           7	Write Manual	10	6
           8	Conversion	10	6
           9	Training	10	8
           10	User Test	10	5,9

           
           
        2. Pert Entry
           
           
        3. Pert Network Diagram
           
           
      
      
   2. Analysis
      • Feasibility
      • Trade-offs
      
      
   3. Design
      • Tools
        • System Flowcharts
          Systems flowcharts are graphic illustrations of the physical flow of information through the entire system.
        • Program Flowcharts
          Program flowcharts illustrate how individual computer programs work.
        • Document Flowcharts
          A document flowchart displays the flow of documents between organizational units.
        • Prototyping
          Prototyping is the creation of a shell template of a system.
        • Structured English
          Structured English is a form of pseudo code that is confined to the three basic control structures of sequence, selection, and repetition.
        • Decision Tables
          Decision tables help a person understand a system process by separating a complex problem into its underlying conditions and actions.
        • HIPO Charts
          HIPO stands for Hierarchy plus Input, Process, Output.
      
      
      
   4. Development
      We talked about software development in the last lecture.
      
      
   5. Testing
      P 215.
      White box / black box
      exhaustive?
      
      
   6. Implementation
      Parallel, turnkey
      
      
   7. Maintenance
      The Iceberg
      
      
2. Self Sourcing p 218.
   
   
3. Prototyping
   
   
4. Outsourcing
   fig 6.8 p226
   Advantages / Disadvantages