Sam Construction
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- Jan 22, 2009
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Someone was asking about a resource levelling problem. Here is a resource leveling problem
260 foot long concrete wall, 10 foot height has been getting poured in 30 feet increments using the following schedule.
Set forms 2 days with 3 carpenters
Pour concrete 1 day, 4 laborers, 3 carpenters and 1 concrete finisher
Strip forms 1 day with 4 carpenters, 1 concrete finisher
The contractor would like to know approximately how much many days will be lost, if he utilizes only 3 carpenters for this operation, given that 120 feet is already completed.
a. 4 Days
b. 2.5 Days
c. 1.5 Days
d. 3 Days
Solution:
Current production
30 feet of wall in (2 days+1 day + 1 day = 4 days)
New production using only 3 carpenters
If 4 carpenters strip 30 feet of wall in 1 day, then 3 carpenters will strip 22.5 feet in 1 day, and they will use .3 of the following day to complete stripping.
30 feet of wall in ( 2 days+1day+1.3 days= 4.3 days)
Remaining work is 260 feet-120 = 140 feet .
140/30 = 4 increments + .667 of an increment or 20 feet.
Time lost for the 4 remaining increments = 4*.33 das = 1.32
The lost time in the remaining 20 feet is .667 * .33 = .22
Total lost time 1.54
Correct answer is C
They can also ask for total duration to build the wall which would be,, you guys can get the point. Right.
260 foot long concrete wall, 10 foot height has been getting poured in 30 feet increments using the following schedule.
Set forms 2 days with 3 carpenters
Pour concrete 1 day, 4 laborers, 3 carpenters and 1 concrete finisher
Strip forms 1 day with 4 carpenters, 1 concrete finisher
The contractor would like to know approximately how much many days will be lost, if he utilizes only 3 carpenters for this operation, given that 120 feet is already completed.
a. 4 Days
b. 2.5 Days
c. 1.5 Days
d. 3 Days
Solution:
Current production
30 feet of wall in (2 days+1 day + 1 day = 4 days)
New production using only 3 carpenters
If 4 carpenters strip 30 feet of wall in 1 day, then 3 carpenters will strip 22.5 feet in 1 day, and they will use .3 of the following day to complete stripping.
30 feet of wall in ( 2 days+1day+1.3 days= 4.3 days)
Remaining work is 260 feet-120 = 140 feet .
140/30 = 4 increments + .667 of an increment or 20 feet.
Time lost for the 4 remaining increments = 4*.33 das = 1.32
The lost time in the remaining 20 feet is .667 * .33 = .22
Total lost time 1.54
Correct answer is C
They can also ask for total duration to build the wall which would be,, you guys can get the point. Right.
