Criterion D closes the design cycle. You test what you built against your specification, judge it honestly, suggest improvements and think about its impact beyond the client.
Tests that generate data about how well the solution meets the specification.
You judge success against each specification point, using test evidence.
Specific, realistic ways the solution could be better.
Who is affected, how, and what happens to the product at the end of its life.
A little of the criterion is addressed. Ideas are basic, partly missing, or not linked to the task.
The main points are there but thin. Some explanations are correct; links to the task or evidence are incomplete.
Mostly accurate, well explained and consistently tied to the task, with only small gaps.
Detailed, precise and justified throughout, with ideas connected and applied to new situations or evidence.
A plain-language guide only. Your teacher marks against the official IB level descriptors.
Evaluate one specification point using test evidence.
The reminder app works well and the client liked it.
Specification point 1 required that a first-time user can set a reminder in under 60 seconds. Three testers took 45, 52 and 78 seconds, so it was met for two of three. The slowest tester struggled to find the time picker, so moving it to the first screen should help. The client can set reminders, but my next version should be tested with more users.
Criterion D is Evaluating. It is marked out of 8 across 4 strands (D.i, D.ii, D.iii, D.iv). Criterion D closes the design cycle. You test what you built against your specification, judge it honestly, suggest improvements and think about its impact beyond the client.
Design tests that produce data, such as timed tasks, counts and ratings, and plan who will test it. Evaluate against every specification point, saying met, partly met or not met, with evidence. Suggest improvements that follow directly from your test results.
Evaluating with I think it worked well and no test evidence. Ignoring specification points that were not met. Impact written only about the client, with no end-of-life or circular thinking.
Written by CritABCD for study and revision, in our own words. The official MYP Design guide and assessment criteria are published by the International Baccalaureate. Official IB guide ↗