In 1963 the United States Federal Government established a Line of
Balance Coordinating Committee to study LOB's applicability and its ties with
network scheduling. Ever since many researchers and practitioners attempted to
integrate the merits of CPM and LOB in graphical, operational research, and
activity-dominated network scheduling. Nevertheless, the obstacles were not truly
eliminated in a simple and practical way that was good enough to be accepted and
adopted by the construction industry. This work presents CPM/LOB, a new
methodology integrating both methods in a network context. It is simple to
comprehend and apply using available commercial CPM computer programs, and
does not require elaborate training.
The method overcomes the vulnerability of CPM to changes in the
sequence of work and inability to maintain work continuity for the working
squads of the repetitive activities. It introduces float into LOB and revives LOB
by creating access to it by commercially available and popular CPM packages.
Several additional features are introduced to facilitate the management of
planning and control of repetitive projects, such as identifying and quantifying
progress that contradicts network logic, evaluating the effect of discrete activities,
and measuring the progress regularity on multiple large housing contracts as well
as single and small repetitive projects.
The principles of the method have been published in Journal of
Constructing Engineering and Management of the American Society of Civil
Engineers in September 1994. Its practical application on projects in Kuwait and
the United States is demonstrated by three case studies.
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.