(Standard IANAL note)
Labor costs are refundable if the labor isn't preformed. If you say that a particular process WILL fix a problem and charge the customer for it, and then complete the process but the problem is NOT fixed, that is fraud and nullifies the value of the labor.
This is because you presented your service as fixing the problem, and so failed to render said service. If you present your service as a task which MAY fix the problem, then all you have to do is exactly what you said you would do.
That's why there's always legal CYA in the contract saying that they don't promise results.
(Standard IANAL note) Labor
(Standard IANAL note)
Labor costs are refundable if the labor isn't preformed. If you say that a particular process WILL fix a problem and charge the customer for it, and then complete the process but the problem is NOT fixed, that is fraud and nullifies the value of the labor.
This is because you presented your service as fixing the problem, and so failed to render said service. If you present your service as a task which MAY fix the problem, then all you have to do is exactly what you said you would do.
That's why there's always legal CYA in the contract saying that they don't promise results.