Page 28 - Industrial Process Plant Construction Estimating and Man Hour Analysis

xlii Introduction

TABLE 11 Straight time and overtime additional MHs

Other factors MH Factor
Straight time
additional MHs MHs 17180 10% 1718
Overtime MHs 600 5% 30
additional MHs Percent
of
19400 MH
2220 112.92%
Range of impact Use
Other factors Minor Average Severe ST OT
Stacking of 10% 20% 30% 10%
trades
Morale and 5% 15% 30%
attitude
Reassignment 5% 10% 15%
of manpower
Stacking of 10% 20% 30%
contractors
own forces
Dilution of 10% 15% 25%
supervision
Learning curve 5% 15% 30%
Errors and 3% 5% 6%
omissions
Sharing 5% 15% 25%
occupancy
with owners
operations
Joint 5% 12% 20% 5%
occupancy
with other
trades
Interferences 5% 12% 30%
with access to
work site
Deficient 10% 25% 35%
materials
delivery
Fatigue 8% 10% 12%