Exam CTFL v4.0 topic 1 question 78 discussion

Actual exam question from ISTQB's CTFL v4.0

Question #: 78
Topic #: 1

Consider an estimation session in which a six-member Agile team (Mempb1, ..., Memb6) uses the planning poker technique to estimate a user story (in story points). The team members will use a set of cards with the following values: 1, 2, 3, 5, 8, 13, 21. Below is the outcome of the first round of estimation for this session:

Memb1 = 3 Memb2 = 3 Memb3 = 3
Memb4 = 21 Memb5 = 3 Memb6 = 1

Which of the following answers BEST describes how the estimation session should proceed?

A. The final estimate of the user story in story points is determined by applying the three-point estimation technique with the following input values: most optimistic estimate = 1, most likely estimate = 3, and most pessimistic estimate = 21.
B. Further estimation rounds should be performed until all team members will pick the card having the same value: this value will represent the final estimate of the user story in story points.
C. The final estimate of the user story in story points is determined by calculating the average value between the most optimistic estimate of 21 story points (Memb4) and the most pessimistic estimate of 1 story point (Memb6).
D. Memb6 and Memb4 which have produced the most pessimistic and the most optimistic estimates respectively, should explain the reasons of their choices to stimulate a discussion between all members before proceeding to another estimation round.

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Suggested Answer: D 🗳️

by cb56e21 at May 22, 2025, 12:45 a.m.

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cb56e21

3 weeks, 4 days ago

Selected Answer: D

Delphi de banda ancha. En esta técnica iterativa basada en expertos, los expertos hacen estimaciones basadas en la experiencia. Cada experto, de forma aislada, estima el esfuerzo. Los resultados se recogen y si hay desviaciones que están fuera del rango de los límites acordados, los expertos discuten sus estimaciones actuales. Luego se le pide a cada experto que haga una nueva estimación basada en esa retroalimentación, nuevamente de forma aislada. Este proceso se repite hasta que se alcanza un consenso. La Planificación Poker es una variante de Wideband Delphi, comúnmente utilizada en el desarrollo de software Ágil. En la Planificación Poker, las estimaciones generalmente se hacen usando tarjetas con números que representan el tamaño del esfuerzo.

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