
Sound Transit 3 is not going to match the stellar project delivery record of Sound Transit 2 barring a bailout from another government or the economy. In attempt to understand the cost estimation failures that got us to this point, on June 24th ST accepted the report of consultants asked to investigate why (report, slides, video).
The report points out parts of ST’s own cost estimation methodology that it did not follow during initial project estimation in 2015 and 2016. In particular, ST did not seek a second opinion on costs and did not sufficiently invovle its own Real Estate division in determining acquisition costs.
It’s a long report and hard to summarize. It identified eight key drivers of the increases between “phase 1” and “phase 2” estimates, and was able to assign a subjective importance to five of them:
Continue reading “Sound Transit seeks to understand cost failures”