Question

21. Using the CPM method, calculate early start (ES), late start (LS), early finish (EF), late finish (LF) and total float (TF) for each activity in the following network and answer the questions 21-1. The ES of activity His: a) 18 b) 22C) 5 d) 2 21-2. The LF of activity B is: a) 20 b) 22c) 18d) 19 ) 13 d) 59 21-3. The TF of activity A is: a) 5 b ) 17 c) 18 21-4. The project duration is: a) 58b ) 60 c) 61 21-5. The critical path(s) is (are): a) B-E-G-F b) B-E-1-) c) B-E-I-K 21-6. The LS of activity L is: a) 54 b) 45 c) 50 21-7. The TF of activity Cis: a) O b) 14c ) 16 d) All previous d) 59 d) 15 KEY EDC в Е. LILILO

Answer 1

For the given CPM Mellood and auswer diogram, we use to fill the boxer the choosing us O|5 451459 10018 610/30 La Bolo lust bäslust 50141551 $415 159 5000 159 16 r asca To 30 solo 1597 TTF EF KEM LSOLF

Below is the table LS LE TE key Duration 7 22 17 0 20 30 59 45 159 30 45 1o ~ 0 o ó OOO 5 59 50 59 Totol Floot = LS-ES (61) LF - EF

EDO ES of achiety 'H' » 18. so option 'a' i correct (27-OLF of activity 'B' => 18 I so option it is correct @G TE of activity 'A' = 17 so ophion 'b' Ý correct @ -6 project duration - 59 so Ophion I i correct W 6 Gutical Patty ore 1B-E-G-F BE-1-1] - so "All precious "Option d u correct 6-0 Ls of activity i = 34 1. so option as is correct D G Tif of activity 'C' => 16 Ophion 'c' i correct BE-I-T B -E- I-K
I draw rough boxes so please fill the boxes based on my table or boxes.... ES means earliest start and EF means earliest finish (take max value of particular activity)

LS means latest start and LF means latest finish (take min value of particular activity)

Total float means LF-EF OR LS-ES... for critical path it is 0....

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