Failure is the state or condition of not meeting a desirable or intended objective, and may be viewed as the opposite of . Product failure ranges from failure to sell the product to fracture of the product, in the worst cases leading to personal injury, the province of forensic engineering.
"If you want to succeed, double your failure rate."
Wired Magazine editor Kevin Kelly likewise explains that a great deal can be learned from things going unexpectedly, and that part of science's success comes from keeping blunders "small, manageable, constant, and trackable". He uses the example of engineers and programmers who push systems to their limits, breaking them to learn about them. Kelly also warns against creating a culture (e.g. school system) that punishes failure harshly, because this inhibits a creative process, and risks teaching people not to communicate important failures with others (e.g. Null results).
The criteria for failure are heavily dependent on context of use, and may be relative to a particular observer or belief system. A situation considered to be a failure by one might be considered a success by another, particularly in cases of direct competition or a zero-sum game. Similarly, the degree of success or failure in a situation may be differently viewed by distinct observers or participants, such that a situation that one considers to be a failure, another might consider to be a success, a qualified success or a neutral situation.
It may also be difficult or impossible to ascertain whether a situation meets criteria for failure or success due to ambiguous or ill-defined definition of those criteria. Finding useful and effective criteria, or heuristics, to judge the success or failure of a situation may itself be a significant task.
Failure can be differentially perceived from the viewpoints of the evaluators. A person who is only interested in the final outcome of an activity would consider it to be an Outcome Failure if the core issue has not been resolved or a core need is not met. A failure can also be a process failure whereby although the activity is completed successfully, a person may still feel dissatisfied if the underlying process is perceived to be below expected standard or benchmark.