In Alan Thomas's lecture on the nBL framework, a diagram similar to the following was shown:

Which of the following statements concerning this diagram is/are true?

Select one or more answers.

Question

In Alan Thomas's lecture on the nBL framework, a diagram similar to the following was shown:

Which of the following statements concerning this diagram is/are true?

Select one or more answers.

BlackTom AI · Accepted Answer

Performance criteria are defined where a performance attribute, an object/part, and a life-cycle stage intersect.

1) Relevant knowledge points and concepts
- The nBL diagram is a three‑axis decision space: horizontal = performance attributes (functional/technical, environmental, economic, social, etc.), vertical = spatial/object scale (products/materials → components → whole building/system → precinct/region), and depth/diagonal = process or life‑cycle stages (planning/delivery → operation/management → refurbishment/recycling). Each cell in the 3‑D grid represents the combination of one attribute, one object/scale and one life‑cycle stage.

2) Step‑by‑step reasoning
- A performance criterion must specify what is measured (attribute), where it is measured (object/scale), and when or during which process stage it is measured (life cycle). That specification is exactly the intersection of the three axes in the diagram.
- The diagram therefore implies that each intersection point (a box in the green grid extended along the diagonal) is a locus for defining a performance criterion.

3) Intermediate logical steps
- Identify axis A = attribute, axis B = object/part, axis C = life cycle stage.
- Intersection (A_i, B_j, C_k) → a distinct criterion (e.g., environmental impact of component X during operation).
- Thus performance criteria exist at those intersections.

4) Why the correct answer is correct
- The statement “Performance criteria exist at the intersection of a performance attribute, an object or part, and a life cycle stage” exactly describes the diagram’s purpose: to decompose assessment into specific, testable criteria located by the three axes.

5) Why the other options are incorrect (briefly)
- Chosen scope being “one of the four options” on the vertical axis: false because scope can be any single level, combinations of levels, or different spatial definitions beyond strictly one of the four labeled rows. The diagram shows possible scopes, not a single required choice.
- Depth axis forcing cradle‑to‑grave: false — the depth/near‑far diagonal represents stages and scales and allows selecting specific stages; it does not mandate a cradle‑to‑grave assessment.
- Each green box = one metric: false — a box denotes a locus for one or more metrics/criteria; multiple metrics (quantitative and qualitative) can be associated with a single intersection.
- Order of attributes implying weighting: false — the horizontal ordering is categorical (types of attributes), not an implied weighting that engineering/environmental are prioritized over economic/social.

6) Conclusion
- The correct statement is the one about performance criteria existing at the intersection; this matches the provided answer.

In Alan Thomas's lecture on the nBL framework, a diagram similar to the following was shown: Which of the following statements concerning this diagram is/are true? Select one or more answers.Multiple choice

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