For each of the following long-term projects, provide a basis for estimating the percentage of the job that has been completed. The discussion in the text used the percentage of total estimated cost incurred during a year as the percentage completed. For this exercise identify bases other than cost for estimating the percentage completed.

a. Construction of a 20-floor building.

b. A three-year contract to provide 24/7 computer maintenance to a financial institution.

c. A contract to remove contaminated earth from around a factory that had been dumping toxic waste for many decades.