Deng, I'm not sure if this post in 100% NTC, but call it what you will.

When I see mention of 'form, fit, and function', I interpret it to mean the engineer was either too lazy to specify exactly what is required, or that the engineer felt using that phrase would make theirself look smart.  (I write 'theirself' because I am too lazy to use 'himself or herself', and justify it by observing that Jane Austen and Barack Obama, among other experts, have used 'their' as a generic substitute for 'his or her'.)

I like to quote something I read in a trade journal at least 20 years ago:  People drop out of engineering work because success in engineering requires an almost slavish attention to detail.

If you have quoted 610 exactly, this 'defect' seems to be more completely described as a 'design defect'.  Louis Hart

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Deng RongJun
Sent: Thursday, December 15, 2016 3:21 AM
To: [log in to unmask]
Subject: [TN] Definition of "form" in IPC-A-610F

Hi TechNetters,

When IPC-A-610F talks about Defect Condition, they said: A defect is a condition that may be insufficient to ensure the form, fit or function of the assembly in its end use environment.

I can understand means of "fit" and "function", but what the definition of "form" is. How to understand the mean of "form"?

 
Best regards

Deng