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The video does a nice job examining Zillow pricing and the accuracy of their Zestimate feature. The above Real Estate information on are Zillows home value estimates accurate was provided by Bill Gassett, a Nationally recognized leader in his field.
Rough Order of Magnitude (ROM) Estimate versus Definitive Estimate. Depending on the organizational structure in which youâre managing projects and the type of project you are working on, you may use different approaches to estimating. Two common estimating types are ROM estimates and definitive estimates. rough order of magnitude (ROM) estimate is the least accurate estimate. The PMBOK Guide 4th Edition gives the guidlines that ROMs are -50% to +50% accurate, the PMBOK Guide 5th Edition gives the guidelines that ROMs are -25% to +75% accurate, or potentially even larger.