Why you only ever model one scenario — and what it costs you
In 1975 an engineer at Kodak assembled the first digital camera. It weighed nearly four kilos and took 23 seconds to record a single black-and-white image onto a cassette tape. By every measure of the day, it was worse than film.
What eventually changed photography was not image quality. It was that the marginal cost of one more photograph fell to nothing. When a roll of film cost money to buy and money to develop, you framed carefully, took one shot and hoped. Once the second attempt was free, people did not simply take the same pictures more cheaply. They took more of them, looked, and tried again. The photographs got better because failure stopped being expensive.
Assignment cost projections are still in the film era.
Ask for one and, in most organisations, there is a fee attached and a wait of several days. That pricing shapes behaviour long before anyone reads the number. Because each scenario costs something, teams model one — and it is almost always the scenario the business has already settled on. The projection becomes a confirmation exercise rather than a decision tool.
The questions that never get asked are the valuable ones. What if this is eighteen months rather than three years? What does the same package cost in Amsterdam instead of Zurich? What if we localise in year two rather than extending? What if the family joins later? Any of those could change the answer materially. None of them get modelled, because each one carries a price tag and a lead time.
So the real cost of an expensive cost estimate is not the invoice. It is the alternatives nobody tested, and the decision that was taken without them.
The fix is not to negotiate a better rate per projection. It is to move the cost of asking towards zero, so that modelling a scenario is something a mobility manager does in an afternoon rather than something they have to justify requesting.
Get that right and the question changes — from "what will this assignment cost?" to "which version of this assignment is the right one?"




