Civil Engineering - Construction Management - Discussion

Discussion :: Construction Management - Section 1 (Q.No.6)


If to, tp and tm are the optimistic, pessimistic and most likely time estimates of an activity respectively, the expected time t of the activity will be


Answer: Option E


No answer description available for this question.

Rajesh said: (Jan 4, 2016)  
Its a formula for expected time.

Burhan Ali said: (Oct 18, 2017)  
Anyone explain it.

Mohamed Sajid said: (Mar 17, 2018)  
Can anyone explain this?

Sameer Sopori said: (Jul 18, 2018)  
It's simply to estimate the AVERAGE TIME, {(t1+t2+t3+t4+t5+t6)/6}.

But here we are using to, tp and tm
'to' Means, expected that the project will be finished within this time.
'tp' Means, there are more chances that the project will be finished within this time.
'tm' Means, there are chances it will take more time, due to accidents or delays or any other reason.

For example: tomorrow I have to pour the concrete in foundation work.

'to' if the weather will remain good and workers will work continuously we can finish it early in 6 hours (20% chances).

'tp' As per the general weather conditions and workers average work output, we will finish it in 8 hours (60% chances).

'tm' in case of rain or snow, or any accident on site, it could take more time, and maybe it will be finished in 11 hours. (20% chances).

So the average expected time is = {to+4ta+tp/6 } = {6+(4*8)+11}/6 = 8.16 hours.

Yiheyis H said: (Aug 14, 2018)  
Thanks a lot @Sameer.

Dharam Singh said: (Sep 26, 2018)  
Thanks all.

Gajendra said: (Apr 4, 2021)  
Thanks @Sameer.

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