Comparative Study of Prospective Delay Analysis Techniques (DATs)

Delays are the major sources of disputes and adverse relationships between the stakeholders in construction industry. The existing delay analysis techniques (DATs), though helpful for decision-making, have not succeeded in properly addressing the high incidence of disputes associated with delay claims resolutions. This research has made a comparative study of limitation and capabilities of different Prospective' DATs i.e., Impacted as Planned method and Time Impact Analysis Method under the same baseline program and under similar circumstances of delay occurrence through the case study of under-Construction Hydroelectric Project and review of the relevant issues not addressed by the techniques. Oracle's Primavera (P6) software has been used for delay analysis. The Contractor has not followed any of the DATs to raise the claim for extension of time. Though the contractor has submitted its revised construction schedule as per the FIDIC conditions of contract and ask for time extension of 721 days, the revised construction schedule has no any linkage with the original approved baseline Schedule. The Impacted as planned technique confined the delay to 621 days. The actual site condition and the progress were not considered in this method. The concurrent delays and pacing delays were also not addressed. According to the Time Impact analysis technique, the contractor's caused delay was 101 days and the delay from Employer's side was 529 days. The actual site condition and the progress were considered in this method. However, none of the Delay analysis techniques is found to address all the delay occurring events. The concurrent delays and pacing delayswere also not addressed. Time impact analysis technique is more accurate method as the site progress is incorporated in this method and is recommended to be followed.