Method 3. ~3 months ~$40,000 Accuracy Large sample; Cheaper, more Stakeholders may Relatively assuming no enhanced by only possible reliable (not question (or find it straightforward and Building data very large partners would be contingent on hard to low cost. Cost purchases, sample size, data owners such co-operation understand) the Large sample size Method. and up to but data will as BIS Shrapnel, from third statistical and robust ~$10,000 for require JLL, etc. parties), more normalisation underlying data. data multiple rapid. routines used. purchases normalisations. (may not be necessary)
Method 3. Building Cost Method. ~3 months ~$40,000 assuming no data purchases, and up to ~$10,000 for data purchases (may not be necessary) Accuracy enhanced by very large sample size, but data will require multiple normalisations. Large sample; only possible partners would be data owners such as BIS Shrapnel, JLL, etc. Cheaper, more reliable (not contingent on co-operation from third parties), more rapid. Stakeholders may question (or find it hard to understand) the statistical normalisation routines used. Relatively straightforward and low cost. Large sample size and robust underlying data.
commercial-building-learning-rates-report-2016.docx