The Business Case Was Approved. Who Owns the Assumptions Six Months Later?

Approval creates a funding decision. It does not preserve the business case.

Every major transformation starts with assumptions: adoption rates, productivity gains, revenue improvement, cost reduction, timing, operating capacity, regulatory conditions or dependencies on other initiatives.

Those assumptions are usually scrutinized when funding is requested. After approval, however, governance often shifts toward delivery status: budget consumed, milestones achieved, scope delivered and risks managed.

Six months into delivery, the program may still be green while the assumptions that made the investment attractive have changed materially.

The value gap often begins with assumption drift.

Consider what can change while delivery remains formally on track:

• The volume forecast that supported the investment declines.
• Adoption takes longer than planned, delaying benefit realization.
• A dependency slips, reducing the value of what the program can deliver on its own.
• Operating costs rise because manual workarounds persist longer than expected.
• Regulatory, market or technology conditions alter the original economics.

None of these necessarily creates a delivery failure. But each can change the expected return.

Finance can track spend without owning value.

A common governance pattern separates the information needed to answer the value question:

Each function can be doing its job correctly while no one is explicitly accountable for asking whether the investment thesis still holds.

The CFO question is not “Are we on budget?”

Budget discipline matters, but it is only one part of investment governance. A stronger executive question is:

That question changes the governance conversation. It connects delivery evidence with the economics of the business case.

Four disciplines make value governance more useful.

Value realization is an active executive responsibility.

The objective is not to create another benefits-tracking framework. It is to keep the economic logic of the transformation connected to the evidence emerging during delivery and after go-live.

For CFOs and executive sponsors, that creates a more useful line of sight: not simply whether the organization is spending what it approved, but whether the conditions required to earn the expected return still exist.

A business case should not become historical evidence the moment funding is approved. It should remain a living decision instrument.