The PoC graveyard is full of technically successful projects. The architecture was sound. The performance metrics exceeded the benchmarks. The delivery team did excellent work. The customer’s engineering lead sent a glowing summary to the account team. And then nothing happened for eight weeks, and then a request to extend the evaluation, and then a change in internal priorities, and then the deal died.
A technically successful PoC that does not close a deal is not a failure of execution. It is a failure of design. The PoC was asked to answer the wrong question.
The question a PoC should answer
A PoC is a decision instrument. Before it starts, there should be a single sentence that describes the decision it will make possible. If you cannot write that sentence, you are not ready to run a PoC.
The sentence is not “does this platform work.” It is not “can we build X on this stack.” It is not “is the performance acceptable.” Those are features of a product demonstration, not a PoC.
The sentence that makes a PoC useful is closer to: “Is the migration complexity low enough to justify committing the team resources to a Q4 delivery?” Or: “Can we achieve the required data residency guarantees while maintaining the latency profile the product team has set as a threshold?” Or: “Does the platform give the security team enough visibility to satisfy the requirement they identified in week three?”
Notice what these questions have in common. They have a specific threshold. They have a named decision-maker who holds the answer. And they are answerable in four weeks by a small team without building a production system.
A PoC that answers one question of this kind moves a deal. A PoC that demonstrates broad platform capability moves a conversation from “we should evaluate this more” to “we should evaluate this even more.”
Who needs to be in the room at the beginning
The most consistent predictor of whether a PoC results in a decision is whether the economic buyer was present when the success criteria were set.
Not present at the final readout. Present at the beginning, when the team is defining what the PoC will measure and what outcome they need to see to move forward.
When the economic buyer is not in that early conversation, you get PoCs designed by technical teams for technical audiences. They test things that matter to engineers: latency, throughput, developer experience, the quality of the SDK. They produce outputs that engineers find compelling. They are then presented to economic buyers who have not been primed to act on them and who respond by asking for more time to evaluate.
The economic buyer who helped define the PoC’s question is invested in the answer. They have already decided what would need to be true for them to move forward. When the PoC produces that answer, the path to a decision is short.
This is why the most important meeting in a PoC is not the kickoff with the technical team. It is the thirty-minute conversation with the economic buyer, before the PoC starts, where you ask them: what would you need to see to be confident in this decision?
That conversation is uncomfortable to request and easy to skip. The account team worries about signaling desperation or putting the deal at risk. The result of skipping it is a PoC that the economic buyer was never committed to, producing results they were never primed to act on.
Scope and time
A PoC that is scoped too broadly and runs too long kills deals in a specific way. The delivery team does good work. The customer’s team gets invested in building something. The relationship deepens. And then the PoC ends and the customer is paralyzed, because they have built a real thing together and moving forward now feels like a much bigger decision than it did at the start.
The relationship that a long PoC creates is real and valuable. But it also raises the stakes of the commercial decision in a way that is not always helpful. A twelve-week PoC that builds a functional prototype has created an implicit expectation that the customer is ready to make a twelve-week production decision. When they are not ready to do that, the PoC becomes a sunk cost that is very difficult to follow.
Four weeks is long enough to answer one question thoroughly. It is short enough that the deal’s momentum does not dissipate in the meantime. The commercial conversation that was alive at the start of the PoC is still alive at the end.
If the customer asks for a longer PoC, that is almost always a signal that the PoC’s question is not clear. More time does not produce clarity on a vague question. It produces more technical evidence for a decision nobody is ready to make.
What the success criteria conversation reveals
The conversation about what a successful PoC looks like is one of the most diagnostic conversations in an enterprise sale. It is also one of the most avoided.
A customer who can articulate specific success criteria has done the internal work to understand what they need. They have aligned internally on the question the PoC needs to answer and the threshold it needs to hit. They are ready to make a decision.
A customer who cannot articulate specific success criteria has not done that work. They may be genuinely interested in the platform. They may not yet have the internal consensus to make a decision even if the PoC goes perfectly. Extending the PoC or running a second phase will not produce that consensus. The PoC is a technical evaluation instrument, not an internal alignment mechanism.
When a customer struggles to define success criteria, the right move is to stop and help them with the internal work before the PoC starts. That usually means a different conversation with a more senior stakeholder about what a positive outcome looks like and who needs to be aligned for the organization to move. That conversation takes two weeks. It is more valuable than a technically perfect PoC that arrives in a customer organization that is not ready to act on it.
After the PoC
A PoC that achieves its success criteria should be followed immediately by a commercial conversation. Not a readout session. Not a summary document. A conversation about next steps.
The gap between the PoC conclusion and the next commercial conversation is the single most reliable predictor of whether the deal closes in the next quarter. A PoC that ends on a Friday and is followed by a commercial conversation on Monday is a deal that will close. A PoC that ends with a readout session and a plan to schedule a follow-up is a deal that is about to start a second evaluation cycle that was not in anyone’s forecast.
The account team who built the PoC’s success criteria into the original commercial conversation does not have to navigate this gap. The customer already knows what the positive PoC result means. They agreed to it in week one. The PoC’s conclusion is not new information. It is confirmation of a decision they were already positioned to make.
That is the difference between a PoC that moves a deal and one that stalls it. The stalled ones are designed to produce evidence. The ones that close are designed to produce a decision.