Lab2.1JOBDESCRIPTIONIMMEDIATE PREDECESSOROPTIMAL DURATIONEXPECTED DURATIONPESSIMISTIC DURATIONTCRITICAL?CRITICAL TIMESSIGMA SQUAREDCRITICAL SIGMAAWarm Engine-141516151150.110.11BRelease oil filterA1101910009.000.00CRemove sump plugA215281511518.7818.78DDrain OilC91011101100.110.11EDispose of old oilD8101210000.440.00FRemove oil FilterB, D1232120.110.11GFit new oil filterF1232000.110.00HReplace sump plugF4565150.110.11IFill with oilG,H5676160.110.11755328.8919.33

T =75Critical Path =53Total project slack =7T2 =19.33T (variance) =4.397Probability of T =0.9999945

Lab2.2JOBIMMEDIETE PREDECESSOROPIMISTIC DURATIONEXPECTED DURATIONPESSIMISTIC DURATIONTIMECRITICAL?CRITICAL TIMESIGMA SQUAREDCRITICAL SIGMAA-4675.8315.830.250.25B-1232.0000.000.110.00CA6666.0016.000.000.00DA58118.0000.001.000.00EB, C19189.1719.178.038.03FD2363.3300.000.440.00GD1786.1700.001.360.00HE, F4464.3314.330.110.11IG, H1685.5015.501.361.36JI2574.8300.000.690.00KI89119.1719.170.250.25LJ2464.0000.000.440.00MK1232.0012.000.110.11NL, M68108.0018.000.440.4478.335014.6110.56

T =78.33Critical Path =50Total project slack =3T2 =14.61T (variance) =3.8224Probability of T =0.99993