Mctj

average maintenance corrective or repair time for the jth replaceable item

TPREPj

average preparation time for the jth replaceable item

TISOj

average fault isolation time for the jth replaceable item

TDISj

average disassembly time for the jth replaceable item

TR/Rj

average time to remove/replace (interchange) the jth replaceable item

TREASj

average reassembly time for the jth replaceable item

TCALj

average calibration time for the jth replaceable item

TVERj

average verification time for the jth replaceable item

TSTj

average time of start-up for the jth replaceable item