1. VCE IT Theory Slideshows
Problem Solving Methodology 2
DESIGN
By Mark Kelly
Vceit.com

2. Contents
What needs designing?
Design tools

3. Design... How the solution will work
What interfaces and output will look like

4. Need to design Hardware needs Software needs
Training and documentation requirements
Procedures that need to be created or changed
Evaluation criteria

5. Tools data dictionaries and data structure diagrams,
input-process-output (IPO) charts,
pseudocode,
object descriptions.

6. Designing how bits of the solution fit together – e.g.
Website pages, style sheets, scripts;
Database queries, forms, reports;
Program modules, procedures, functions.

7. Useful tools for this Website: storyboards, site maps
Database: entity-relationship diagrams, data flow diagrams, structure charts,
Multipurpose: hierarchy charts, context diagrams, use cases.

8. Design Consider alternative designs More than one way to skin a cat
Some designs may be technically great, but unacceptable because of constraints

9. Design Every solution has both pros and cons
What’s acceptable to a developer might be impossible for the client
Selecting a design strategy means achieving maximum “pros” with minimum “cons”
What is a pro or con varies from client to client

10. Physical Design Tools These actually plan how to build a system
They give instructions on what to do
Physical data dictionaries (e.g. “Customer_Surname is string, 25 characters”)
Data Flow Diagrams...

11. Physical Design Tools Storyboards Structure Charts IPO charts
Layout diagrams / mockups
Pseudocode

12. Designing appearances
layout diagrams,
annotated diagrams/mock ups
prototypes

13. Designing the evaluation criteria
What measures will be used to judge whether or not the solution requirements have been met?
Should relate to the solution requirements identified in the analysis stage’s logical design.

14. Design Must be documented
If successful, will lead to Development phase. If not, cancel the project.
Is used as a strict instruction manual during the following phases, particularly during Development

15. VCE IT THEORY SLIDESHOWS
By Mark Kelly
vceit.com
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