During planning, your team compares tasks to previous similar ones. What estimation technique is this?

Question

BlackTom AI · Accepted Answer

The question asks to identify the estimation technique described as comparing tasks to previous similar ones during planning.
Option 1: Wideband Delphi — This method involves multiple experts iterating estimates anonymously and discussing until consensus is reached. It does not necessarily rely on comparing to prior similar tasks, but rather on expert judgment and structured rounds.
Option 2: Regression modeling — A statistical approach that uses historical data to model the relationship between variables and predict effort. While it uses past data, it focuses on building a mathematical model rather than directly comparing to “previous similar tasks.”
Option 3: Planning poker — A collaborative technique where team members independently estimate using cards, then discuss to converge. It leverages collective judgment but not specifically by referencing prior similar tasks.
Option 4: Parametric — This method uses mathematical relationships and parameters (like cost per unit, lines of code, function points) to estimate, typically requiring a defined metric rather than direct task-to-task analogy.
Option 5: Analogy-based Estimation — This approach estimates based on similarities to previously completed tasks, adjusting for differences in size, complexity, or context. It explicitly relies on comparing current work to past, analogous work to derive estimates.
In clinical and project-management contexts, the core idea of analogy-based estimation is to leverage historical experience by directly relating a current task to a known, similar past task to infer effort or duration.
The other techniques described emphasize consensus processes, statistical modeling, or parameter-driven calculations rather than the explicit practice of comparing one task to a stored set of similar tasks.
Thus, the option that aligns with the notion of “comparing tasks to previous similar ones” is the approach grounded in analogy with past work, rather than purely statistical, consensus-based, or parametric methods.

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During planning, your team compares tasks to previous similar ones. What estimation technique is this?

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