Changes to the assessment to compare different scenarios or upgrade options. Can be used in NatHERS or DTS assessments on design stage to identify most cost effective option to achieve required star rating. With Scorecard, variations can be used to identify most effective upgrade path or if the rating is required before and after the upgrades (for a discounted loan or a rebate).
Variations can be small or complex. Complex variations, when changes are made to the zones (rooms) ie changing in size, adding or removing rooms, may require additional fee.