I’m an amateur woodworker and, as such, am often to be heard reciting the woodworkers creed “measure twice, cut once”. The idea goes that, rather than making annoying and time-consuming mistakes, it is best to measure a task more than once, and only when one is sure of the measurement to cut the piece once, and to the correct length.
The same metaphor exists in the world of applications, especially for those who are wrestling with the annoying task having to bring critical old code into more modern formats (the example GitHub gives is the mind-bending task of bringing Fortran application code into Ruby).
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