Results
In this section, the results of the multiple-case study are presented. Table 2 summarizes the lowest, highest, and average maturity levels for each construct obtained from the 19 case companies. The data from the 19 assessments show that there is a large potential for improvement in the Dutch construction industry. The average maturity level for the various constructs varies between 0.8 and 3.6 on a scale of 0 to 10. Moreover, looking at the spread between the lowest and highest maturity levels, it can be concluded that there are plenty of possibilities for benchmarking within the Dutch construction industry. The percentages of companies achieving each maturity level for each construct are presented in Table 3. These results clearly show that the vast majority of companies have maturity levels which fit within the project-level classification (i.e., maturity levels 1–3). Some companies have reached maturity levels that belong to the regional classification (maturity levels 4 and 5), but only one company obtained, and then only for two constructs, a maturity level belonging to the business unit classification (maturity levels 7 and 8). None of the companies achieved corporate level classifications (maturity levels 9 and 10). The detailed results for eachconstruct are presented in next subsections, including an overall result matrix (as described in the previous section) per construct. These result matrices show the percentages of companies per construct that have met a specific criterion (see Tables 4–8). Table 3 presents the percentage of construction companies that have reached a certain maturity level per construct; these percentages are explained by analyzing the detailed results per construct presented in Tables 4–8.