“…Maintenance processes (TA:MTPR) 12 [61,78,95,104,112,118,125,136,142,144,149,164] Program comprehension (TA:PCMP) 23 [42,44,50,69,71,82,93,97,109,111,113,114,115,116,117,120,130,137,138,148,152,160,161] Maintainability improvements (TA:MNTB) 8 [52,83,91,107,126,127,141,159] Debugging (TA:DEBG) 5 [62,94,99,157,158] Economic estimation of maintenance:…”