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018-hirst-painting/docs/sqa/reviews/rc-007-business-case-visible-colours.md
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Tirsvad 701feb1e52 Add objective O6 and criterion SC8 to the Business Case: visible colours
Drawing the first painting from a photograph showed colours that pass the
white-shade rule (SC3) but are still faint on the white background. Add O6
(every dot clearly visible: drop palette colours whose contrast with white is
below 2.0) and SC8, plus the WCAG contrast standard, an In Scope item, a risk
row and the Problem Statement sentence. SC3 is unchanged and still holds.

The limit of 2.0 was chosen by S01 from the measured palette of the reference
image: 8 of its 30 colours fall below it and the next is at 2.56, so 22 remain.

Record the delta re-review as RC-007 (verdict Go, terms confirmed by S01).
2026-10-08 00:45:19 +08:00

5.9 KiB

Review Record: Business Case BC-001, objective O6 (delta)

Metadata

Key Value
ID RC-007
CrossReference BC-001, RC-001, SA-001, QC-BC-001, QC-LANG-001

Version History

Date Status Author Reviewer Change Commit
2026-10-08 Accepted Jens Tirsvad Nielsen S01 Initial version (draft prepared by the assistant for S01 to confirm)
Terms confirmed by S01, verdict Go
pending

Artifact Under Review

  • Instance reviewed: BC-001, the revision of 2026-10-08 (second row of its Version History)
  • Checklist used: QC-BC-001, together with QC-LANG-001 because the Business Case is written in the PO language
  • Scope: delta re-review of criteria 2, 3, 4, 5 and 6 of QC-BC-001 and criteria 3, 4, 5, 9 and 10 of QC-LANG-001. Reason: the revision adds objective O6, success criterion SC8, a scope item, a risk row, the contrast standard (WCAG) and a sentence in the Problem Statement, and it changes the Stakeholders row from "O1 to O5" to "O1 to O6". Earlier record: RC-001, which passed every criterion on the first version. The other criteria are untouched by the revision and keep their earlier result: QC-BC-001 1 (cost-benefit), 7 (assumptions and constraints) and 8 (recommendation), and QC-LANG-001 1, 2, 6, 7 and 8 (metadata, headings, no translated twin, no change of language)
  • Language and domain: en / it (the artifact's Metadata rows)
  • Language reviewer: none. S01 reads English and knows the IT domain. S01 is also the author; S01 accepted a documented self-review on 2026-10-07 (see RC-001, Action Item 1)

Status of this record: final. The assistant read the revised Business Case against the criteria above; S01 confirmed the open point on 2026-10-08 and the verdict is Go.

Stakeholder Analysis: SA-001 is not revised. S01's concern "The result looks clean and the window stays open until a click" (Usability) already covers O6, and every concern still traces to an objective, so its own checklist result is unchanged.

Evidence for SC8 and the risk row: the palette of the reference image was measured on 2026-10-08 with the WCAG contrast ratio against white. The 30 colours range from 1.22 to 15.85; the eight palest lie between 1.22 and 1.96, the next colour is at 2.56, so a limit of 2.0 removes 8 and keeps 22. The limit was chosen by S01 on 2026-10-08.

Checklist Results

# Criterion Status Evidence/Notes
2 Risks are identified with documented impact and mitigation Pass The Risks table now has 7 rows; the new row (the contrast cut-off removes too many colours) has the impact "The painting looks dull" and a mitigation with figures from the measurement above
3 Success criteria are measurable, stating explicit targets rather than vague aspirations Pass SC8 states a target (0 palette colours with a contrast ratio against white below 2.0) and a measure (the printed palette with the contrast of every colour). It is consistent with SC3, which still holds for the final palette
4 Scope explicitly separates In Scope vs Out of Scope Pass The new In Scope item names the faint-colour removal and its limit; Out of Scope is unchanged and still distinct (no other parameters, no interface, no packaging)
5 Stakeholders are cross-referenced to Stakeholder Analysis IDs rather than re-described inline Pass The Stakeholders table still cites S01 only, now for "O1 to O6"; the new text refers to S01 by ID
6 Methodology and quality-standard foundation are stated explicitly (e.g. ISO/IEC 25010, Larman) Pass The Methodological and Standards Foundation gains a "Contrast" bullet naming the WCAG 2.x contrast ratio computed from relative luminance, with its two reference values (1.0 for white, 21.0 for black)

Language and Domain Results

# Criterion Status Evidence/Notes
3 The content (prose and table cells) is written in the stated language Pass The new prose and table cells are English
4 The register matches the one the registry gives for the artifact type Pass Registry gives IT Executive English for BC. The new objective, criterion and risk state decisions and targets; the technical definition (relative luminance) is confined to the standards bullet where a standard belongs
5 Domain terms are the PO terms of the domain's dictionary, with no synonyms Pass S01 confirmed on 2026-10-07 that no dictionary is needed. The new term faint colour is used in every new place (Problem Statement, In Scope, Risks) and is defined by SC8 as a contrast below 2.0; white shade keeps its meaning from SC3
9 A reviewer competent in the domain, and in the language, has confirmed that the domain terms are used correctly Pass S01 confirmed on 2026-10-08 that the new terms faint colour and contrast ratio are used correctly (Action Item 1). S01 is also the author; the self-review was accepted on 2026-10-07
10 Abbreviations are spelled out on first use, in the stated language Pass WCAG is spelled out at its first use ("Web Content Accessibility Guidelines (WCAG) 2.x"); O6 and SC8 are defined by their tables

Overall Verdict

Go — every criterion in the delta passes. S01 confirmed on 2026-10-08 that the new terms faint colour and contrast ratio are used correctly, so QC-LANG-001 criterion 9 is closed and the action item is closed. The revision of BC-001 can be Accepted, after which the new phase can be planned against O6 and SC8.

Action Items

# Action Owner Due
1 Confirm that the new terms faint colour and contrast ratio are used correctly (QC-LANG-001 criterion 9). Closed 2026-10-08: S01 confirmed both terms S01 2026-10-09