SYSE.17:4 - Solution

Apply the general affected-System discovery move to one proposed engineering alternative or change. Retain only consequence claims that change or hold open a named engineering decision, and state what supports each claim.

SYSE.17:4.1 - Perform the Move

Name the focus and receiving decision. State the proposed alternative or change, the actual System or intended System referent and configuration to which it applies, the use situation, relevant scope and horizon, and the engineering decision that can use the result.
Generate consequence-producing situations. Consider Work and events that may expose the alternative’s consequences—for example, realization, intended use, maintenance, plausible misuse, failure, recovery, retirement, or later modification. Retain only situations whose consequences could alter the receiving decision; these examples do not impose a lifecycle.
Trace outward without promoting hypotheses to facts. Follow supported obtaining relation occurrences separately from modal consequence-path claims. For each modal path, name candidate participants and proposed relation kinds—for example, material transfer, energy transfer, information transfer, exposure, access, resource use, an economic relation, or an institutional relation—together with conditions, evidence, uncertainty, and the useful consequence or limit for this decision. A modal path does not itself select a probe.
Recognize the bearer. Identify each actual System from evidence about its identity and boundary. A role label, organization name, collection, description, or representative can help locate a candidate but does not establish that identity. Keep a possible-future bearer as an intended System referent in the claim until the System exists and can be recognized. State what remains unknown when recognition needed by the decision fails.
Qualify the consequence. State the characteristic or condition that may change, bearer, configuration, conditions, direction or magnitude cue when known, interval, and uncertainty. Distinguish an observed occurrence from a modal claim. State the evidence basis—for example, observation, measurement, simulation, model-based prediction, or a bounded expert estimate—and its limits. Use C.28 when reliance depends on a causal, intervention, or counterfactual claim.
Add value and specialist claims only when needed. Name the bearer and value frame for a value-qualified consequence—for example, a claimed benefit, harm, burden, opportunity, or accepted loss. Preserve conflicts and distributions. Select any specialist acquisition through A.15.9 and C.11.DUA before sending the question with its System, claim, evidence, and receiving decision; keep the returned authority boundary visible.
Change the engineering choice. Add or revise a decision contribution—for example, a constraint, alternative, probe, safeguard, monitoring condition, reversible step, refusal, or escalation. When that contribution relies on permission, authority, responsibility, or representation, establish the required relation separately.
Finish with the useful answer and its material uncertainty. A qualified consequence account, constraint, alternative, or explicit unknown can complete this use. Select a further discovery action through C.11.DUA only when its obtainable contribution warrants the full preparation, access, performer, interpretation, delay, displacement, and downside. Compare observations separately and together against shared resources and the decision window. Retain the residual and reopen condition that matter to the receiver; an unselected inquiry needs no proposal or omission certificate.

The numbered presentation is an A.22.CGUS learning unfolding, not a required Work sequence. Discovery, design, trial, specialist inquiry, and consequence observation can overlap and reopen one another.

SYSE.17:4.2 - Record the Result

Field	Required content
focus and receiver	Proposed alternative or change; actual System or intended System referent and configuration to which it applies; use, scope, horizon, and receiving engineering decision.
examined situations	Consequence-producing Work or events retained because their consequences could alter the decision.
bearer references	Each actual System and its recognition basis, or each intended System referent and modal-reference basis; unresolved population, collection, or whole questions remain explicit.
relations and modal paths	Supported obtaining relation occurrences; separately stated modal consequence-path claims; conditions, evidence, uncertainty, any selected probes, and missing-relation blockers.
consequence claims	Changed characteristic or condition, bearer, configuration, time, direction or magnitude cue, observed-or-modal status, evidence basis, uncertainty, and causal status.
value and specialist results	Current value judgement and value-frame source, any conflict, the required specialist result, and its authority boundary.
engineering decision contribution	A named change to or unresolved need in the receiving decision—for example, a constraint, alternative, probe, safeguard, monitoring condition, reversible step, refusal, escalation, authorized representative, or protection result.
residual and reopen	Missing bearer references or modal paths and the concrete change that matters to a later receiving use. Include a further action only when its obtainable contribution warrants the complete inquiry burden.

An initial account can contain one qualified consequence and one named uncertainty—for example, an unidentified bearer, unsupported relation, or missing specialist result—when they already change the decision. A bounded expert estimate is usable when better evidence is not affordable; label it as judgement with its basis and uncertainty rather than measurement or prevalence evidence.

SYSE.17:4.3 - What Changes in Practice

Visibility, influence, contract, and project role stop being the entry criteria. Engineers trace a proposed alternative or change to actual Systems or intended System referents, distinguish obtaining relations from modal path claims, and feed uncertain but material consequences back into decisions while change remains affordable.