Five Checks for a More Useful Pool Improvement Plan

Check 1 — name an observation the change could affect

Write a concrete outcome such as repeated long free-roll finishes at a called target, plus the conditions in which it occurred. Avoid improve confidence or fix everything as the tested outcome. Select a change with a plausible connection to that observation and no comfort or safety penalty.

For the worked example, use the near-target part of the cue-only task in the linked stroke guide: cue center (2, 1), target disk radius 0.15 at (4, 1), no object and no intended cushion contact. The proposed change is a smaller chosen delivery pace, with direction and tip contact retained. This example is hypothetical, not a reported player result.

First select the observed difficulty if several unrelated errors compete.

Recreate the exact free-roll protocol before testing the worked change.

Check 2 — protect a matched baseline

Allow two declared unscored familiarization strikes per condition per occasion, four total, before scoring. Each complete occasion has 16 scored strikes plus 4 familiarization strikes=20 total. Two occasions have 32 scored and 8 familiarization=40 strikes, with 16 scored per condition. Rest, reschedule or stop; these are allocations, not required continuous volume.

An interruption before striking is administrative. A struck foul or lost-input attempt stays in the outcome denominator and receives the appropriate process flag. A smaller disk, different cloth or changed contact creates a new version, not a comparable retest.

Check 3 — keep an independent record of whether the change happened

A target flag and an input-retained flag answer different questions. If B makes more targets but the contact or pace rule was abandoned, its result does not isolate the planned change. Use video only if it can resolve a specific observable issue with permission and a stable safe view; do not infer an exact impact speed from appearance alone.

Hypothetical two-occasion totals: A target 7/16 and inputs 15/16; B target 10/16 and inputs 11/16. A first-occasion B lead that reverses later is another warning. Keep the original rows and directions; three extra target finishes are not proof that the change causes improvement.

Check 4 — include the cost of making the comparison

The comparison uses 50 minutes for 32 scored strikes; 40 physical strikes include familiarization. 50/32=1.5625 minutes per scored opportunity is a workload description, not an efficiency rating or a recommendation to hurry. A useful small change may still be too expensive to evaluate during every short visit.

Record whether the work displaced an already useful task. If setup takes most of the session or fatigue defeats the input rule, simplify the design before increasing volume. Keep rest in the ledger instead of claiming it was free additional practice.

Fit the comparison to an actual session budget without adding uncounted minutes.

Check 5 — decide what transfers and what needs another test

Use three conservative dispositions: keep provisionally when the change is comfortable and repeatedly usable; retest when input adherence or day-to-day results are unclear; reject or hold when it creates discomfort, unsafe reach or an unmanageable task. Do not claim that a short comparison predicts a tournament result.

In ordinary games, record only relevant cue-speed opportunities and whether the requested next shot remained usable. Two usable opportunities out of three is a separate 2/3 game record; it is not added to the target totals. If the skill improves only with the target visible, recognition and planning need their own question.

Save the disposition, exact version and next action. A coaching question can be precise: which observable input changed between these two records? That is more useful than asking for a guaranteed quick fix.

Put the retained change into a wider training plan after the comparison is sufficiently stable.

Validate usable position rather than nearby arrival when the transfer question concerns next-shot angles.