The data collection process was only partly successful in providing all the information expected on all the projects reviewed. Of the 80 projects initially reviewed, only 50 projects had a reasonable amount of information, and were retained for analysis. Although most of the information required on the retained projects was available, some key data was lacking. When information was lacking on a specific aspect of a project, the project was excluded from the analysis of this particular aspect. Therefore the analysis of one aspect may have been based on a different number of projects as that for another aspect.
Information was more readily available for civil engineering and building project types as compared to equipment/development and outsourcing project types. Therefore the results relating to the civil engineering and building categories are based on a greater number of projects than those relating to the equipment/development and outsourcing categories.