TY  - CONF
TI  - Importance of Site Conditions and Capacity Allocation for Construction Cost and Performance: A Case Study 
C1  - Gold Coast, Australia
C3  - 5th Annual Conference of the International Group for Lean Construction
SP  - 77
EP  - 90
PY  - 1997
AU  - O'Brien, W.J.
AU  - Fischer, M.A.
AU  - Akinci, B.H.
AD  -  Ph.D. student, Department of Civil Engineering, Stanford  University  
AD  - Assistant Professor, Department of Civil Engineering, Stanford University
AD  -  Ph.D. student, Department of Civil Engineering, Stanford  University 
ED  - Tucker, Selwyn N. 
AB  - Traditional construction thinking that an ‘optimal’ solution to the problem of shifting project schedules can be found via a time-cost tradeoff analysis does not take into account the influence of capacity allocation and site conditions on cost and performance. Specifically, the time-cost tradeoff can only account for the direct costs of compressing an activity's duration, not its capacity costs. Loosely restated, the time-cost tradeoff accounts for the costs of a change in an activity's duration but not the costs of a change of when in time the activity takes place (which will affect a firm's commitments to other projects and hence cause capacity costs). Similarly, moving an activity in time may place the activity in a different set of site conditions than those which were assumed when the activity's cost-time curve was generated. The cost-time curve of an activity may change as site conditions change, which can only be accounted for in the time-cost tradeoff optimization method by manually generating new cost-time curves for each instance of site conditions and solving anew (an exercise that quickly becomes too cumbersome to perform). This paper presents an in-depth case study of a £100 Million project highlighting the limited applicability of the time-cost tradeoff approach to real world situations and discusses the impact of site conditions and capacity allocations on cost and performance.
KW  - time-cost tradeoff
KW  - capacity allocation
KW  - site conditions
KW  - supply chain  management
KW  - construction scheduling
PB  - 
T2  - 5th Annual Conference of the International Group for Lean Construction
DA  - 1997/07/16
CY  - Gold Coast, Australia
L1  - http://iglc.net/Papers/Details/30/pdf
L2  - http://iglc.net/Papers/Details/30
N1  - Export Date: 19 April 2024
DB  - IGLC.net
DP  - IGLC
LA  - English
ER  -