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Economics for the Modern Built Environment

are considered to be the most important, primarily on account of the court’s comments and advice on the approach and methodology used. For each dispute, details are given of the project concerned, the dispute itself, the judgment and a commentary on the comments and advice given by the court. Four ‘thorny issues’ prevalent in the dispute arena are identified and discussed in Part 4. They are float, concurrency, mitigation and acceleration, and time at large. In most standard forms of contract, it is unclear whether it is the employer or contractor who owns the programme float. The common response is that the project owns the float, which means that either party can use it. Concurrency refers to situations when two or more delays occur at the same time or overlap, which makes it difficult to decide how to treat the delay. The book presents the methods of assessment and a practical approach with worked examples. Mitigation refers to a contractor’s obligation to mitigate delays, including the effects of employer-responsible delays. In many instances this leads to conflicting interpretations of the level at which it could be interpreted as mitigation or acceleration to catch up for delays by others which could lead to further claim for compensation. Finally, the expression ‘time at large’ is used to indicate that the contractor believes that there is no enforceable date for completion. Nonetheless, this means not that the contractor has no obligation to complete the works but rather that he has to complete in a ‘reasonable time’. What is reasonable depends on the facts and circumstances at the time. Finally, the book ends with assessment methods and techniques. Part 5 reviews and discusses the various types of delay analysis methods and techniques that are used in extension of time submissions. They are: impressionistic, simplistic, prospective analysis, and retrospective analysis. The final chapters give worked examples of prospective analysis and retrospective analysis using the techniques of ‘time impact’ and ‘windows’ methods of analyses. Finally, Part 3 looks at the contractual requirements and conditions for monetary compensation for time-related delays. The amount of the contractor’s entitlement will depend on his actual costs. This is illustrated though worked examples dealing with direct costs and various overheads. This book, written in a practical and user-friendly style, gives useful guidance and recommended good practice on all the common delay analysis techniques, and worked examples of extension of time submissions and time-related prolongation claims. It will principally be useful for professionals and lawyers who are involved in time-related claims. But it will also be very informative for academics who are interested in project planning and control. Roger Gibson has over 40 years of planning and programming experience in the construction and engineering industries. During the latter part of his career he has received many appointments as an expert in time-related disputes.