A business case that survives contact with year two: what to include, how to model ramp and attrition, which baselines to capture, and how to present it so it cannot be misread.
Why the hourly rate on a proposal is not the cost of the capability. What a rate card excludes, how to compare offers on the same basis, and the questions that expose the difference.
A true-up cost calculator reconciles the offshore cost you modelled against the cost you actually incurred. What it includes, how to build one, and the line items that break business cases.
The costs that never appear on an invoice and routinely break offshore business cases: ramp, transfer drag, management overhead, attrition and the fixed costs that do not scale down.