Data is the software developer's raw materials. If you are a machinist and you don't care about the material quality and specs, you're gonna have a bad time. Ev

Data is the software developer's raw materials. If you are a machinist and you don't care about the material quality and specs, you're gonna have a bad time. Everything depends on the data model, input gets transformed in one or more stages to give some output, if you don't know the required data states between stages you can't write the transforms properly.