CTFL-AcT Exam Dumps : ISTQB Certified Tester - Acceptance Testing (CT-AcT)

Comprehensive Detailed Explanation (Approx. 200 words):

Acceptance criteria are an essential part of requirements engineering and test design. According to the ISTQB CTFL Acceptance Testing Syllabus, acceptance criteria are defined as a set of statements that specify what must be true for a system, feature, or user story to be considered acceptable to stakeholders. These criteria are used as the basis for developing acceptance test cases and help bridge the communication between stakeholders, business analysts, developers, and testers.

They are not exclusive to Agile frameworks (contrary to option A); while common in Agile (e.g., as part of a user story), they are equally valuable in traditional lifecycles. Option B is incorrect because testers are encouraged to collaborate in defining acceptance criteria early to ensure testability and clarity. Option C incorrectly states that acceptance criteria replace acceptance tests in ATDD (Acceptance Test-Driven Development). In fact, acceptance criteria are transformed into acceptance tests during ATDD.

Exact Reference – ISTQB CTFL Acceptance Testing Syllabus (Section 2.1):

“Acceptance criteria describe the conditions under which a requirement, user story, or business process is considered successfully implemented. They provide the foundation for acceptance testing and serve as input to test case development.”

Therefore, option D is the most accurate.

Let’s analyze the DMN table shown in the image:

Rule 1: If weight ≤15, size ≤50, and distance ≤10 → use Normal bicycle

Rule 2: If weight is between 15 and 60 kg, size ≤150, and distance ≤25 → use Electric cargo bike

Rule 3: Otherwise → use Electric van

Now consider the options:

A: Incorrect — parcel size is not the only determining factor for using electric vans; it's about weight, size, and distance combined.

B: Incorrect — normal bicycles are used only when weight ≤15 kg, size ≤50 cm, and distance ≤10 km — so not just “short trips.”

C: Incorrect — electric cargo bikes are explicitly used for short trips (≤25 km), per Rule 2.

D: Correct — based on the rules, any weight above 15 kg (and up to 60 kg) results in the use of electric cargo bikes. So if weight >50 kg (but ≤60), cargo bike is still used under the conditions of Rule 2.

Therefore, the most consistent interpretation of the decision model is:

Answer: D. When the weight of the parcel exceeds 50kg then the electric cargo bike is necessarily used

Acceptance Test-Driven Development (ATDD) involves early collaboration between stakeholders to define acceptance criteria and tests before development begins. Using business process models in ATDD helps visualize user behavior, align test cases with real workflows, and serve as living documentation.

Option C is the least meaningful argument because:

Business process models abstractly describe workflows and decisions at a business level. While they help clarify requirements and detect requirement-related defects, they do not directly support detecting defects in the application code, which is typically the focus of unit and integration testing, not acceptance testing.

Let’s validate the other options:

A is a strong argument — process models clarify use cases for testers.

B is valid — graphical models help visualize test coverage directly.

D is true — as business process models evolve, they remain valuable artifacts aligned with current system behavior and requirements.

Answer: C. Business process models will make it easier to detect defects in the application code.