"All of the major components are within specification and we have confidence in them," he said.

"The Game Machine does not interfere with individual parts so long as they are played within specification and no complaints are lodged."

Originally, it referred to the ability of manufacturing processes to produce a very high proportion of output within specification.

The message to managers was that simply being within specification was not good enough.

The propeller control units were tested and were discovered to perform within specification.

A PWI greater than or equal to 100% indicates that the profile does not process the product within specification.

The part being checked must pass through the first gap and must stop at the second gap in order to be within specification.

"You will find that it's entirely within legal specification."

In total 1,108 units were constructed of which 2 were destroyed during production because the bodyshells were not within specification.

A PWI of 99% indicates that the profile processes the product within specification, but runs at the edge of the process window.