[Year 12 SofDev] (no subject)

[Langham, Peter P]

Good morning,



First year SD teacher - so my apologies if this has been discussed and resolved in the past.



I've noticed that Context Diagrams, Data Flow Diagrams and Use Case Diagrams are all mentioned in both the Analysis and Design sections of the PSM, page 17 in the study design.



Analysis involves:

* Determining the solution requirements. What information does the solution have to provide? What data is needed to produce the information? What functions does the solution have to provide? These requirements can be classified as being functional, namely what the solution is required to do, and non-functional, which describes the attributes the solution should possess, such as userfriendliness, reliability, portability, robustness, maintainability. Tools to assist in determining the solution requirements include context diagrams, data flow diagrams and use cases.

<snip>

Design involves:

* Planning how the solution will function, and the appearance of the resulting information. The solution design typically involves identifying what specific data is required and how the data will be named, structured, validated and manipulated. Typical design tools for this purpose include data dictionaries and data structure diagrams, input-process-output (IPO) charts, flowcharts, pseudocode, object descriptions. Solution design also involves, where appropriate, showing how the various components of a solution relate to one another, for example web pages, style sheets, scripts; queries, forms, reports; modules, procedures, functions. Typical design tools used to show relationships include storyboards, site maps, entity-relationship diagrams, data flow diagrams, structure charts, hierarchy charts, context diagrams, use cases. Planning the solution also involves determining the appearance of information generated from a solution. This typically involves identifying the position of text, images and graphics, font sizes, colours and text enhancements. Design tools used for this purpose include layout diagrams, annotated diagrams/mocks up.

It's my understanding that context diagrams, data flow diagrams and use cases should only appear in the analysis stage of the PSM.

Is this correct?

Thanks,

Peter Langham
Narre Warren South P-12 College

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