A milestone can need extra reservations
Seven remaining completions at an 80% factor require nine attempts after rounding.
Practical relationship planning
Translate a completed-meeting milestone into scheduled attempts, weeks to target, projected completions, and horizon slack after an entered missed-meeting rate.
MEETING MILESTONE TIMELINE
A milestone such as ten completed meetings is not the same as ten calendar reservations. This calculator increases the scheduled-attempt count for an entered missed-meeting rate, adds planning lead time, and compares the resulting week to a fixed horizon. It uses expected completion arithmetic rather than guaranteeing a date.
MEETING MILESTONE TIMELINE
A positive slack result means the risk-adjusted attempt sequence fits the entered horizon; it does not promise that a particular meeting will occur.

| Milestone layer | Count / rate | Unit interval | Calculated value |
|---|
CURRENT CALCULATION PROCESS
R=G−C; N=ceil[R/(1−m)]; W=B+Nk; P=C+floor[(H−B)/k](1−m)
Subtract completed meetings from the target, divide by the entered completion factor, round scheduled attempts upward, then place them after the opening buffer at the chosen cadence.
| Symbol | Meaning | Unit | Default |
|---|---|---|---|
| G | Completed-meeting target | meetings | 10 |
| C | Completed meetings to date | meetings | 3 |
| m | Missed-meeting rate | decimal | 0.20 |
| R | Remaining completions | meetings | 7 |
| N | Scheduled attempts required | attempts | calculated |
| k | Cadence interval | weeks/attempt | 4 |
| B | Opening planning buffer | weeks | 2 |
| H | Planning horizon | weeks | 52 |
| P | Expected horizon completions | meetings | calculated |
Conversions and rounding: Convert the missed rate from percent to decimal. Round attempts upward because partial reservations cannot be scheduled; keep projected completions decimal because they are an expectation, not a count of real events.
HOW TO USE
SUBJECT FUNDAMENTALS
MODEL AND FORMULA
Subtract completed meetings from the target, divide by the entered completion factor, round scheduled attempts upward, then place them after the opening buffer at the chosen cadence.
DEEPER DECISION ANALYSIS
Seven remaining completions at an 80% factor require nine attempts after rounding.
Cadence spaces recurring attempts; the opening buffer protects the first booking from immediate pressure.
A projected 12.6 completions describes a planning average, not a literal fraction of a meeting.
WORKED DECISION CASES
The default milestone fits in 38 weeks and retains fourteen weeks for disruption.
A shorter horizon or higher missed rate can move the milestone beyond the boundary without changing the relationship goal.
TECHNICAL LANGUAGE
EVIDENCE AND DATA LINEAGE
Keep dates of completed, postponed, and cancelled meetings; record who traveled, notice given, and whether a reschedule happened. Use the same completion definition throughout the milestone and revise the missed rate when the pattern changes.
LIMITS AND EXCLUSIONS
RELIABLE SOURCES
FREQUENTLY ASKED QUESTIONS
A partial attempt cannot be reserved, so the meeting count is rounded to the next whole event.
Yes, when you deliberately want a no-cancellation baseline; compare it with a stress case.
No finite number of attempts can produce an expected completion when the completion factor is zero.
No. This model applies it once before the first future attempt; cadence handles later spacing.
Use the achieved milestone as the baseline or set a higher target; the page rejects an inverted gap.
It is a simple expected-value scenario based entirely on your entered cadence and missed rate.
IMPORTANT NOTE
Use shared milestone records only with both people’s agreement. Do not treat a missed reservation as evidence of intent, affection, or wrongdoing without context.