This document contains three questions related to construction project scheduling: 1. The first question provides a table of activities, durations, and crew sizes needed to build 12 houses over 60 days. It asks to create a line of balance schedule and determine when the first roofing team will leave the site. 2. The second question provides a network diagram of activities needed to build a single house. It asks to determine the number of crews needed for each activity to build 5 houses over 24 days and create a schedule showing crew entry and exit dates. 3. The third question provides durations for activities to build a house. It asks to calculate a weekly target rate to complete 30 houses in 85 days, determine the number of

1. Mansoura University Construction Project Management
Faculty of Engineering 3rd Year Civil
Structural Eng. Dept. 2006-2007
Exercise 5
Due date: Wednesday, Nov 16th 2006
1. The construction of a housing project involves the activities given in the following table. The
contract is for the construction of twelve houses in 60 days. The man-hours for each activity
and the crew size/house are also given. Prepare an LOB schedule for the contract. Assume a
minimum buffer time of one day and six 8-hour days per week. What is the overall project
duration and when will the first team of roof leave the site.
Description Predecessors Man-hours Team Size / Section
Activity
10 Substructure - 100 4
20 Superstructure 10 200 8
30 Roof 20 60 4
40 Carpenter 30 90 6
50 Plumber 30 45 3
60 Electrician 30 40 3
70 Plaster 40, 50, 60 120 8
80 Final fix 70 350 24
2. The following network diagram represents the activities involved in a single house. Each
activity shows the man-hours needed and the number of crew members. Assume 8 working
hours per day and one day buffer time between activities.
If you are to construct these tasks for 5 houses in 24 days, calculate the number of crews that
need to be involved in each activity. Draw the schedule and define the day numbers in which
each crew enters and leaves the site.
Sanit. Main Footing 2
48 Mhrs 64 Mhrs
3 Men 2 Man
Excavation Footing 1 Wall 1 Wall 2
48 Mhrs 64 Mhrs 72 Mhrs 72 Mhrs
3 Men 2 Man 3 Men 3 Men
3. The construction plan for a house is as follows, with activities durations in days:
D (2)
A (5) B (5) C (7) E (3) F (5)
Construction Management 1 Dr. Emad Elbeltagi

2. Mansoura University Construction Project Management
Faculty of Engineering 3rd Year Civil
Structural Eng. Dept. 2006-2007
a) Calculate a weekly target rate to be used for scheduling a project of 30 repetitive houses, if
all crews are working five 8-hour days per week and the project has to be delivered in 85
days.
b) Given a desired target rate of four units per week, what is the number of crews to be
employed in activity B.
c) Using the same number of crews obtained in (b), activity B has to be speed-up to a target
rate of 5 units per week. Calculate how much time a crew needs to cut from the duration of
each unit. Work continuity and crew synchronization has to be maintained.
Construction Management 2 Dr. Emad Elbeltagi