Heuristic Evaluation — Coterie - Change Shipping Date
Change shipping date of diaper subscription from July 5 to June 29, 2026
Screens Evaluated
The screens below are the evidence this evaluation is based on, shown in flow order.
1
2
3
4
5
6
Executive Summary
8.5/10overall usability
3
Total Findings
0
Major / Catastrophe
3
Minor
0
Cosmetic
Top 3 Critical Issues
- 1Could improve visual indication of the desktop becoming inactive — H1: Visibility of System Status · Minor Usability Concern
Location: side sheet opening over homepage - 2Could use undo button — H3: User Control and Freedom · Minor Usability Concern
Location: When changing date - 3can't hide promo bar — H8: Aesthetic and Minimalist Design · Minor Usability Concern
Score Card
| Visibility of System Status | Match Between System and the Real World | User Control and Freedom | Consistency and Standards | Error Prevention | Recognition Rather Than Recall | Flexibility and Efficiency of Use | Aesthetic and Minimalist Design | Help Users Recognize, Diagnose, and Recover from Errors | Help and Documentation | Severities (Total) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Severity 0 = No Usability Concern | |||||||||||
| Severity 1 = Cosmetic UI | |||||||||||
| Severity 2 = Minor Usability Concern | 1 | 1 | 1 | 3 | |||||||
| Severity 3 = Major Usability Concern | |||||||||||
| Severity 4 = Usability Catastrophe | |||||||||||
| Heuristics (Total) | 1 | 1 | 1 | Total = 3 |
COTERIE - CHANGE SHIPPING DATE — DISTRIBUTION OF USABILITY ISSUES (TOTAL = 3)
JAKOB'S 10 HEURISTIC PRINCIPLES
Usability CatastropheMajor Usability ConcernMinor Usability ConcernCosmetic UINo Usability Concern
Detailed Findings
H1: Visibility of System Status
Minor Usability Concern · 2 Issue 1.1 — Could improve visual indication of the desktop becoming inactive
Observation: Why it may violate (inference): may be hard to tell you need to interact with side sheet Confidence: Medium.
- darker shade of gray
Positive Examples
- ✅ Change date button turns blue to indicate user is on an active button link, it does inactive the entire screen when side sheet comes out, but could be grayer
H2: Match Between System and the Real World
Not evaluated.
Positive Examples
- ✅ real world conventions matched my mental model of how to interact with UI, instructions clear, icons and symbols intuitive
H3: User Control and Freedom
Minor Usability Concern · 2 Issue 3.1 — Could use undo button
Observation: Why it may violate (inference): user can't easily undo action, but can go back and manually change Confidence: Medium.
- add "undo" on confirm screen in case of mistake
Positive Examples
- ✅ easy to customize
H4: Consistency and Standards
No significant issues found.
H5: Error Prevention
No significant issues found.
H6: Recognition Rather Than Recall
No significant issues found.
H7: Flexibility and Efficiency of Use
No significant issues found.
H8: Aesthetic and Minimalist Design
Minor Usability Concern · 2 Issue 8.1 — can't hide promo bar
Observation: Why it may violate (inference): less important element taking space Confidence: Medium.
H9: Help Users Recognize, Diagnose, and Recover from Errors
No significant issues found.
H10: Help and Documentation
No significant issues found.
Prioritized Action Items
Should Fix (Severity 2)
| Finding | Heuristic | Severity | Recommendation |
|---|---|---|---|
| Could improve visual indication of the desktop becoming inactive | H1: Visibility of System Status | Minor Usability Concern | darker shade of gray |
| Could use undo button | H3: User Control and Freedom | Minor Usability Concern | add "undo" on confirm screen in case of mistake |
| can't hide promo bar | H8: Aesthetic and Minimalist Design | Minor Usability Concern |
Positive Highlights
- ✅ Change date button turns blue to indicate user is on an active button link, it does inactive the entire screen when side sheet comes out, but could be grayer (H1)
- ✅ real world conventions matched my mental model of how to interact with UI, instructions clear, icons and symbols intuitive (H2)
- ✅ easy to customize (H3)
Guardrail Self-Check
- ✓ Every finding points to a specific, visible element.
- ✓ Observation, inference, and recommendation are separated.
- ✓ Each finding carries a confidence level.
- ✓ Completed by a named human evaluator.
- ✓ This evaluation does not replace usability testing with real users.
Evaluator
Evaluator
Kamala Alcantara, Senior UX Researcher · 2026-06-29
Reviewed by: Kamz · 2026-06-30
Kamala Alcantara, Senior UX Researcher · 2026-06-29
Reviewed by: Kamz · 2026-06-30
Methodology Notes
Evaluated against Nielsen's 10 usability heuristics. Each finding and each heuristic is rated on Nielsen's 0–4 severity scale (0 = not a problem, 1 = cosmetic, 2 = minor, 3 = major, 4 = catastrophe), which sets fix priority. Human-created design.