measure of completion
I think it would be better to measure "completion" not by "the degree of implementation of the functionality you wanted to create" but by "the degree of conveyance of the intention you tried to create.
discussion
https://www.facebook.com/1129148772/posts/10222747022960722?d=n&sfns=mo
Definition of completion
Permanent incomplete, this is completion.
Fear of publishing in an unfinished form.
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