Examples of Why Partial Credit is a Dangerous Concept

The Tacoma Narrows Bridge:

Did the engineers get partial credit because the bridge lasted a whole three months?


 

Mars Climate Orbiter:

Did the engineers get partial credit for getting the probe to Mars but missing the planet because they couldn't reconcile English and Metric units?

 


STS Columbia:

Did the engineers get partial credit for getting these astronauts into space but not back down safely?