In short
A collection is a group of fragrances connected by a principle you can state, and different enough to justify each one. Making three is enough to force the real problems: what stays the same, what changes, and how to stop them turning into one fragrance with three names. This final project brings together the track's disciplines of reduction, variation, constraint, study, signature and critique.
What you will learn
- Plan three pieces with a shared principle and clear differences
- Keep each piece's decisions on record
- Have the collection critiqued by others
Before this lesson: Revising Other People's Work
Choosing a principle
| Connection | Example | Risk |
|---|---|---|
| Shared material | One iris, in three contexts | All three can seem alike |
| Shared structure | A long top with almost no heart, in three families | The structure may go unnoticed |
| A progression | The same scene at dawn, noon and night | Depends on the story |
| A constraint | Fewer than 12 lines, no naturals | Only you may notice |
| A material family's range | Three aspects of musk | Blind spots in your audience |
Write the principle in one sentence, and then write what would count as failing it.
Planning the three
- Write the collection page. Principle, audience, limits (lines, cost, dose) and what makes each piece necessary.
- Sketch. Make at least two sketches per piece, to avoid locking in your first idea.
- Build the shared part. If there's a shared accord or premix, get it right first.
- Develop. Keep an iteration log per piece. Compare across pieces every few rounds, and don't work on one for too long.
- Distance check. Are they too similar? Too unrelated? Adjust with intent.
- Reduce. Run a reduction pass on each.
- Check. Cost, restriction self-check and stability screening, recorded for each.
Tests for a collection
| Question | Test | Success looks like |
|---|---|---|
| Are they different enough? | Blind pairing or triangle tests between pieces | Reliably told apart at the time that matters |
| Are they related? | Sort your three with three outsiders, coded, asking which belong together | Yours tend to group, or the connection is openly conceptual |
| Does each earn its place? | Ask which one could go | Reasons differ; no piece is always named |
| Does the principle read? | Describe, then reveal the principle, and ask if it fits | People find it plausible |
The written account
For each piece, write up to a page, covering:
- What the piece does in the collection, in a sentence.
- Three key decisions, with what you tried, what you found and why you chose it.
- A rejected idea and why you dropped it.
- What you would change with more time.
- Its status note, stating what has and hasn't been checked.
Add a one-page introduction on the principle, and end with a statement of what the collection taught you.
The outside critique
Ask at least one person with more experience than you, or two peers, for a written critique using the framework. Ask them to smell first, and read your account second. Then respond to the critique in writing: what you changed, and what you didn't, and why. If you can't reach a professional, say so. Peer review still counts.
Assessment
| Criterion | Meets it if |
|---|---|
| Principle | Written first and testable |
| Difference | The three can be told apart blind by at least two people |
| Decisions | Each has logs, including rejected ideas |
| Craft | Each has been through a reduction pass and at least two blind comparisons |
| Critique | An outside critique exists, with your written response |
| Honesty | Status is stated, and unresolved flaws are listed |
Practical exercise: Final project: a three-part collection
Complete the project above. Allow several weeks, since your blind tests and aging need time, and work on all three in rotation.
You have done this well if a reader could understand each decision, the pieces are demonstrably different and connected, and you have responded honestly to a critique you didn't entirely enjoy. Each composition remains a study work unless it's separately tested and assessed, and finishing this track confers no qualification.
Common mistakes
- Making one fragrance three times. Test how far apart they are.
- Making three unrelated ones and inventing a link. Start with the principle.
- Writing the account afterward from memory. Keep logs as you go.
Knowledge check
Written and reviewed by the RUŌOD Lab team. This is general education, not legal, regulatory, medical or safety advice. Example dilutions and exercises are for learning, are not validated products, and have not been safety-assessed. Completing a lesson confers no qualification. How we check these lessons.