Specifications include, but are not limited to: A. Development of property analyses or valuations that recognize a blending of cost methods and that depart from strict reliance on Net Book Value. The ATB, Appeals Court, and SJC decisions provide guidance. B. The alternative analyses or valuations to be provided must be supported with cost data from sources recognized in the area of utility personal property valuation. C. The alternative analyses or valuations must be documented with consideration and pertinent analysis of actual and effective age; economic life; physical depreciation; functional obsolescence; and economic obsolescence. D. The analysis or valuation method, documentation, and determination of value must comply with DOR certification requirements. E. Conferences with the Assessors, DOR personnel, and company representatives may be required.