7. Activities involved in Generator Modernisation at BHEL Haridwar with their durations and imme diate predecessors are as under:

(i) Identify and remove redundant immediate predecessor(s) if any.
(ii) Develop an arrow diagram and find the project completion time.

(iii) Calculate total float for the non-critical activities.

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Job Activity detail Preceding activities Duration (No. of days) a Preparation for hydraulic and cyclic test 2 b Preparation for HV test 3 Generator dismantling 3 d Rotor withdrawal C 1 e Insulation cover opening d 6 f HV test b 1 g De-wedging of slots c, d 5 h Debriding c, d 8 i Overhang bracket modification c, d 5 j Hydraulic and cyclic test k Bus bar modification a d, i 4 1 Epoxy injection in overhang d, k 1 c, d,j, e 10 8 m Ripple spring fixing n Slot wedging 0 Overhang braiding P Final hydraulic test 9 Box filling r Final HV test S Putty ring formation t Cleaning and painting e,j, m d, h k, l, n, o g. p f.q r S 514321