6. Establishing brackets helps the technician avoid pointless checks. There
are three types of pointless checks which should be avoided: irrelevant
checks, redundant checks, and premature checks. An irrelevant check is a
check outside the brackets; it is unimportant and has no relation to the
suspected trouble. A redundant check is a check which has been made
already; it is timeconsuming and gives no new information. A premature
check is a check which does not reveal anything because enough other
information is not known; it would have been done later.
A check which has already been made is called a check.
A check outside the brackets is called an check.
A check made too soon which should have been made later is a check.
Answers for frame 6: redundant, irrelevant, premature