Practice Flashcards
Flip to reveal answersWhat are the four links in a justified material choice?
Track your progress — Sign up free to save your progress and get smart review reminders based on spaced repetition.
All 4 Flashcards — Justifying a choice
Sign up free to track progress and get spaced-repetition review schedules.
Question
What are the four links in a justified material choice?
Answer
The requirement from the specification, the property it demands, the evidence for that property, and the trade-off accepted. Missing the evidence link makes it a preference.
Question
Primary vs secondary evidence for a material choice?
Answer
Secondary is published — property tables, standards, corrosion charts, supplier data sheets. Primary is your own testing on this material in this environment.
Question
Why corroborate a supplier data sheet?
Answer
The supplier gains if you believe it and nobody independent checked it. It is evidence of what the material is offered as; a second source makes it a number you can defend.
Question
Why must a justification name a trade-off?
Answer
Every choice gives something up. An answer listing only advantages reads as advocacy; naming the cost and arguing it was worth paying reads as judgement.
Read the notes
Full study notes for Justifying a choice
Topic 7.1 hub
Material selection
More from Topic 7.1
All flashcards in this topic
Design Technology exam skills
Paper structures & tips
Track your progress with spaced repetition
Sign up free — Aimnova tells you exactly which cards to review and when, so you remember everything before your IB exam.
Start Free