Cost
A cost formulation is a container of CostCalculators plus the rollup Responses (per line, per tier, grand total) that summarize them at every replication's end.
Lifecycle. A formulation is constructed before model.simulate() runs, walks the MultiEchelonNetwork at construction time to instantiate one calculator per source kind (Phase 3 detail), and pre-allocates every rollup Response. Each calculator subscribes to its own source via a ksl.observers.ModelElementObserver; the formulation itself sums the calculators' per-line Responses in its own ksl.simulation.ModelElement.replicationEnded() override — KSL's tree walk guarantees the calculator children have already fired by then because children are visited before parent.
Multi-attach. A single MultiEchelonNetwork may carry multiple formulations. Each is independent — different formulations may use different CostParams, different physical-unit conventions, even different line-item structures, without interference. All formulations report at every replication end; the half-width summary shows confidence intervals for every formulation's Responses in parallel.
See also
Inheritors
Properties
The calculators this formulation manages. Phase 2's skeleton formulation returns an empty collection; Phase 3 populates it with concrete calculator instances.
Grand-total rollup Response — the sum across every line and every tier this formulation produces.
Functions
Per-line rollup Response — the sum of every calculator's lineResponses[line] for the most recent replication, or null if this formulation does not produce that line.
Per-(tier, line) rollup Response — the sum of every calculator's lineResponses[line] whose CostCalculator.tier matches tier, or null if this formulation does not produce a rollup for this combination. Used by Phase-4 to re-point the legacy 16 cost responses on ksl.modeling.supplychain.network.MultiEchelonNetwork onto formulation-managed Responses.
Per-tier rollup Response — the sum of every calculator's lineResponses[*] whose CostCalculator.tier matches tier, or null if this formulation does not produce a per-tier rollup for tier.