For readers of The Missing Link

The story is fiction. The tools are not.

The matrix, the scoring sheet from the appendix, and the frameworks Elena used at Vertex. Start with your own product.

The Missing Link — book cover

Start here

Three ways in, depending on how much time you have.

4 minutes · 10 questions

The QuickCheck

The sticky-note moment, compressed. A first read on where your friction sits, benchmarked against 81 executives.

Take the QuickCheck

20 minutes · 32 questions

Score your own product

The full sheet from the appendix, scored for you. Then do what Stefan did: same questions, every role alone. The distance between the sheets is the finding.

Score your product

30 minutes · one conversation

Talk it through

You have two numbers and a team that disagrees about them. That is the moment to bring someone in from outside.

Book a call with Norbert
2x2 matrix chart showing Product Market Fit on the vertical axis from low to high and Product Company Fit on the horizontal axis from low to high. Four quadrants are labeled: top-left with an icon of a frustrated person’s head and lightning bolts labeled 'Frustrated Customers'; top-right with stacked coins and arrows labeled 'Optimal Alignment'; bottom-left with a scale icon labeled 'Deadweight Product'; bottom-right with an icon of frustrated people under a cloud with a lightning bolt labeled 'Frustrated Organization'. A gray bar across the middle area reads 'The Missing Link'.

The second axis

The matrix from the poster paper.

Frustrated Customers

The company runs smoothly. The market has moved.

Optimal Alignment

Both fits hold. Rare, never permanent.

Deadweight Product

Nobody wants it, nobody can build it well.

Frustrated Organization

The product works. The company stalls. Vertex, before Elena.

Elena's toolbox

Every tool in the story, by chapter.

Ch. 1
The two worlds sketchSales reality, Engineering reality, and the bridge nobody built.
Ch. 5
Dancing in someone else's shoesThe perspective switch. Works in ninety minutes.
Ch. 12
The product-market-fit cycleProblem, vision, hypothesis, beachhead, build, test, learn.
Ch. 28
What we know, what we assumeNineteen sticky notes on an importance-by-uncertainty grid.
Ch. 38
Jobs-to-be-DoneThomas Bauer hired Vertex for three jobs, not a feature list.
Ch. 39
The executive performance paradoxSensible targets that cancel each other out.

What comes next

The workbook is in progress.

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