ITPEC IP April 2018 Question 50

A trial model early on fixes the user interface and checks performance — prototyping lets users see and try the system before it is built for real.

In the prototyping model a working trial model (prototype) is built at the start, users evaluate it, and their feedback settles the requirements, especially the user interface; performance can be checked at the same time. Misunderstandings surface before design and coding, which cuts the rework that late specification changes would cause.

Answer (a)

Why not others:

• •(b) — repeating the development process and assessing risk in each cycle is the spiral model
• •(c) — completing part of the functions in each cycle and growing the system step by step is incremental development
• •(d) — requirements analysis, design, production and test in strict order, suited to large systems, is the waterfall model

Key rule: Recognise each model by its signature: prototyping, an early trial model for user feedback; spiral, risk analysis every cycle; incremental, functions added in stages; waterfall, one pass through the phases in order.

Software Development Management Techniques · AI-written, may contain errors