Software Design & Development

Software Design & Development

1. Development Methodologies

   • Agile
     • Client is involved throughout, goals can be changed throughout
       • Teams communicate with each other, regular face to face communication
         • Focuses on reducing documentation
           • Breaks it down it short steps, cross functional teams
             • Adaptive methodology
               • No fixed testing
   • Waterfall
     • Client is only involved at the end, specification is fixed
       • Teams work independently in isolation
         • Specification created at the start
           • Follows strict plan set at the start
             • predictive methodology
               • Fixed testing

2. Software Development Process

   • Analysis, design, implentation, testing documentation, evaluation, ,maintainence
     • Software specification is a legally binding document
       • Iterative process

3. Analysis and Design

   • Purpose - A general description of the purpose of the software
     • Scope - A list of delivarables that the client will hand over to the client, can include tim elimits
       • Boundaries- Help limit what the project is and isnt
         • Functional Requirements the features and functions thge software must deliver

4. Parameter Passing

   • Global and local variables
     • Local
       • Local Variables only exist in the subroutine they are declared
         • Advantages- Aids Modularity, More efficient in terms of memory, Removes naming clashes
     • Global
       • Global variables means it is accesible in every subroutine

5. File Handling

   • Read, write, append closing

6. Data Structures Parallel Arrays

   • Arrays arranged parallel to each other

7. Standard algorithms

   • Find min, max
   • Linear search
   • Count Occurences

8. Data Structures Records

   • Can be used as alternative to parallel arrays, Use data classes

9. String Handling

   • String is an array of characters ,made up of substrings
     • Strings are immutable

10. Testing and debugging

    • Good software is reliable, robust and portable

11. Evaluation

    • Reference to fitness for purpose, effienct use of coding constructs, suitable data types and stuctures and fixed and conditional loops.