Library / Music and Dance Practice Engineering Principles Framework
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Source changed 2026-10-03 11:52:20 UTC · snapshot created 2026-10-03 11:53:41 UTC · last check 2026-10-03 12:30:19 UTC

MDPE.19:3.5 - Change the selected relation and test the claimed reproduction

When a change is warranted, target the continuation-critical relation supported by the current account or a completed test. A supported fragile continuation or authorized local retirement need not first manufacture a failure experiment. Examples of targeted changes include:

Observed weaknessRelation-specific intervention
One performer or teacher is irreplaceableDevelop and test another Agent’s capability; distribute teaching or correction Work; preserve access to the remaining expert without assuming unlimited unpaid Work.
Material survives but tacit Method is missingCombine source recovery with rehearsal, annotation, oral history, movement or sound analysis, and a receiving trial.
Instrument, hardware, software, or calibration is the single point of failureMaintain it, prepare a compatible replacement, preserve configuration information, or branch to a variant with declared changes.
One venue, organizer, or event provides the only recurring opportunityDevelop another provider arrangement, share organizing capability, or redesign the practice for another suitable setting.
Practitioners can perform representative Work that enacts the variant, but audiences or selectors cannot recognize itDevelop recognition capability through MDPE.23 or change the presentation and selection arrangement through MDPE.13, while preserving the variant’s relevant distinctions.
Literal reproduction is infeasible or undesirableSelect a branch that preserves the needed function or relations and state what changed; do not claim uninterrupted identity without evidence.
Support cost or harm exceeds current valueRetire the named class, repertoire membership, service, publication, or support arrangement within authority; preserve useful memory and notify affected Agents when required.

When the task includes performing a selected intervention, a capable and authorized Agent uses the applicable direct teaching, coaching, rehearsal, preservation, maintenance, software, event-production, organization-change or retirement Method. The continuation decision neither grants permission nor establishes that the intervention occurred. A warranted proposal can finish before that Work; a claimed tested intervention cannot.

When the requested result is tested post-change reproduction, observe representative Work under the changed condition. A document, training event, software change, new assignment or maintenance action is not that result. If reproduction succeeds, report the Work and changed arrangement; if it fails or remains inconclusive, report that result. Claim that the intervention repaired or strengthened continuation only with a suitable C.28 basis. A bounded keep, reverse, revise or stop decision can use the weaker supported result without another trial or causal comparison.