Below is the example how to calculate it: -

B=5 G=5 A=1 D=10 Fe7 I=6 E=5 H=4 Marking Scherme i identification of the Critical Path 2 2 Calculation of the forward and backward pm 05 11 Total Markafor Text 2 20 Instructions 1 Rename the file with your Student Ne and Student Name. Otherwise 1 mark will be deducted 2 Put your Student Ne and Student Name on the top of the paper. Otherwise 1 mak will be deducted Ne submissions through email. Otherwise 2 males will be deducted. All submissions via dropbox 4 Mark the Activities of the Critical thin YELLOW, otherwise 1 mark will be deducted AY Carly Finish 1 A 1 5 G 1 4 A24 7 LS 7 LF 10 C=7 F.5 Start 7 14 15 21 23 26 D=8 G7 1 End 7 14 16 2 23 26 B-6 15 22 E = 5 HE8 10 15 22 Step-1 Identify all paths and identify the critical path with duration 1 A+ C + F + 1 20 2 B+C+F+1 22 3 B+D+G+! 25 4 B+E+H+1 23 5 B +D+H+! 26 Step-2 Step-3 Calculate the ES, EF, LS, LF of the activities on the Critical Path B D H 1 Es = 1 Es (D) = Ef (B) + 1 = 7 Es (H) = 15 Es (1) - 23 Ef = Es +D-1 Ef (D) = 7+8 -1 = 14 Ef (H) = Es[H) +D - 1 Ef = 23 +4 -1 = 26 Ef = 1+6 -1 = 6 Lf = 14 Ef (H) - 15+ 8 - 1 = 22 Lf - Ef-26 Lf = 6 Ls = 7 Lf (H) = Ls (1) - 1 Ls (1) ELF (1) - D + 1 Ls = 1 Lf (H) = 22 Ls (1) - 23 Ls (H) - 15 Calculate the ES, EF, LS, LF of the activities on the non-critical path A F G Es = 1 Es = 7 Es - 14 Es = 15 Es7 Ef=4 Ef = 13 Ef = 18 Ef = 21 Ef = 11 Lf - 10 Lf 17 Lf = 22 LF (G) = Ls (1) - 1 LF (E) = Ls (H) - 1 Ls = 7 Ls = 11 Ls = 18 Lf (G) = 22 LF (E) = 14 Ls = 16 LS (E) = 14-5+1 LS (E)= 10 E