I also prefer the word mistake.. because this is the meaning of failure:
Dictionary.com Unabridged (v 1.1)
fail·ure [feyl-yer]
–noun
1. an act or instance of failing or proving unsuccessful; lack of success: His effort ended in failure. The campaign was a failure.
2. nonperformance of something due, required, or expected: a failure to do what one has promised; a failure to appear.
3. a subnormal quantity or quality; an insufficiency: the failure of crops.
4. deterioration or decay, esp. of vigor, strength, etc.: The failure of her health made retirement necessary.
5. a condition of being bankrupt by reason of insolvency.
6. a becoming insolvent or bankrupt: the failure of a bank.
7. a person or thing that proves unsuccessful: He is a failure in his career. The cake is a failure.
As you can see.. it is negative no matter what spin you put on it.
And this is the meaning of mistake:
Dictionary.com Unabridged (v 1.1)
mis·take [mi-steyk] noun, verb, -took, -tak·en, -tak·ing.
–noun
1. an error in action, calculation, opinion, or judgment caused by poor reasoning, carelessness, insufficient knowledge, etc.
2. a misunderstanding or misconception.
–verb (used with object)
3. to regard or identify wrongly as something or someone else: I mistook him for the mayor.
4. to understand, interpret, or evaluate wrongly; misunderstand; misinterpret.
–verb (used without object)
5. to be in error.
—Idiom
6. and no mistake, for certain; surely: He's an honorable person, and no mistake.
Mistakes are much more human no?
bec