Estimation Methods: What Really Works - and Why Less Is More

In Brief

• Scrum Poker is our de facto standard: it turns estimates into conversations – and that's its value.

• The Three-Point Method deliberately accounts for uncertainty – ideal for proposals and early project phases.

• Estimation quality comes from good architecture, shared experience, and honest retrospectives – not from a variety of methods.

• Focus beats breadth: teams that master two methods estimate more precisely than those with many half-known ones.

Why Estimation So Often Goes Wrong

It's a familiar scene: a refinement session is going well, the user stories are clear – and then comes the question of effort. The estimates are all over the place. Someone says 2 hours, someone else says 2 days. What follows isn't a conversation about complexity, but an implicit negotiation until everyone settles on an average that no one actually believes in.

The problem is rarely the method. It's the absence of a shared language. And that's exactly where a good estimation method comes in – not as a tool, but as an invitation to discuss.

Scrum Poker: Reveal the Cards, Make Differences Visible

Scrum Poker – also known as Planning Poker – solves this problem elegantly. All participants choose a card simultaneously and reveal it at the same time. Whoever estimates "5" while everyone else is holding "13" has to explain why. That moment is precisely the value of the method: it makes differences visible before they manifest themselves in flawed timelines.

At Unic, we have established Scrum Poker as our shared estimation language. We never mandated it – it wins people over on its own merits, for small sprints as well as larger estimation rounds. Once you've experienced it, you instinctively reach for it again.

The Three-Point Method: Planning for Uncertainty Instead of Estimating It Away

There are situations where Scrum Poker reaches its limits. A project hasn't started yet. User stories exist only as rough ideas. A proposal still needs to be submitted. This is where a different way of thinking helps.

The Three-Point Method – also known as PERT estimation or the Three-Time Method – doesn't ask for one number, but three: How long in the best case? In the realistic case? In the worst case? From these three values, a weighted estimate with a transparent range is produced. Clients immediately understand how confident an estimate is – and can make better decisions about whether they want to carry a risk.

The method makes visible what a point estimate conceals: that uncertainty is not a flaw, but a piece of information.

Three Factors That Truly Determine Estimation Quality

We surveyed 28 professionals from our backend and frontend teams internally. In addition to method preferences, we were interested in the open-ended comments – and these delivered the most relevant insight.

Our conclusion is clear: the choice of method is secondary. What matters are three factors:

• Clear architecture and good project design from the outset – Those who estimate a well-thought-out task estimate more precisely. That sounds obvious. But it also means: those who invest early in the initial design will estimate more precisely.

• Methods that fit the context – No framework suits every situation. Scrum Poker works during an active sprint. The Three-Point Method fits in the early proposal phase. Knowing this means reaching for the right tool at the right time.

• Shared learning from comparing plan versus actuals – Estimates don't improve through more methods. They improve through honest retrospectives: What did we estimate? What did it actually turn out to be? What can we take away from that?

Estimation is not a one-time act. It's a learning process – and teams that nurture it get better. Not because they master more methods, but because they systematically draw on their own experience.

Focus Over Variety: What We're Doing Differently Now

We have drawn a clear conclusion: our internal method framework focuses exclusively on Scrum Poker and the Three-Point Method. We have removed the other methods from our framework.

This achieves three things:

• Clarity – No method zoo that nobody follows.

• Comparability – Estimates from different teams become easier to understand.

• Shared language – Project management and development are talking about the same thing.

Those looking to build methodological knowledge will find proven expertise with us – not a textbook.

Are you thinking about how to build or sharpen estimation skills within your team? Get in touch – we'd be happy to discuss it in a brief conversation.