--- id: CAP-ACC-PRD-010 title: Configure discounts for quantity purchases feature: FEAT-ACC-PRD-03 product_area: accounting module: products revision: 4 status: draft product_intent: proposed implementation_evidence: partially-observed supersedes: - react-console acceptance inventory CAP-ACC-PRD-012 - react-console acceptance inventory RUL-ACC-PRD-027 source_sha: services-accounting: f47cb263875bbc0c5640fba7dae6785ec32695f8 react-console: baf6dae382d6f41dce976c7f848667ccc37e076f intent_sources: - 'services-accounting:docs/milestones/ACCT-M1-books-and-invoices.md#D12' purpose: Finance describes quantity incentives as a set of bands. outcomes: - Quantity incentives remain consistent across product saves. concepts: - CON-ACC-PRD-001 actors: - ACT-ACC-006 - ACT-ACC-011 surfaces: - console - api permissions: - key: accounting.products.update where_checked: api scope: tenant rules: - id: BR-CAP-ACC-PRD-010-01 proved_by: [ATS-ACC-PRD-010-01, TST-ACC-PRD-039, TST-ACC-PRD-066] statement: >- A quantity band includes both endpoints or has no upper endpoint and reduces unit price by a zero-to-one-hundred percentage with two decimals or a nonnegative minor-unit amount. kind: validation enforced_at: - api - service - database must_prove: true provenance: test source: >- services-accounting:modules/products/tests/unit/rules/product-rules.spec.js#refuses a percentage above 100 origin: 'services-accounting:docs/milestones/ACCT-M1-books-and-invoices.md#D12' - id: BR-CAP-ACC-PRD-010-02 proved_by: [ATS-ACC-PRD-010-01, TST-ACC-PRD-039, TST-ACC-PRD-066] statement: A band’s final quantity cannot be smaller than its initial quantity. kind: validation enforced_at: - api - service - database must_prove: true provenance: test source: >- services-accounting:modules/products/tests/unit/rules/product-rules.spec.js#refuses a range that ends before it starts, naming the row origin: 'services-accounting:docs/milestones/ACCT-M1-books-and-invoices.md#D12' - id: BR-CAP-ACC-PRD-010-03 proved_by: [ATS-ACC-PRD-010-02, ATS-ACC-PRD-010-05, TST-ACC-PRD-027, TST-ACC-PRD-039, TST-ACC-PRD-066] statement: 'Quantity bands cannot overlap, and validation compares every pair and identifies the conflicting ranges.' kind: invariant enforced_at: - service must_prove: true provenance: test source: >- services-accounting:modules/products/tests/integration/services/persistence/products.features.integration.spec.js#refuses overlapping bulk pricing ranges, naming the rows origin: 'services-accounting:docs/milestones/ACCT-M1-books-and-invoices.md#D12' examples: positive: A band ending at nine can precede an open-ended band starting at ten. negative: Bands from one to ten and from ten to twenty overlap at ten. - id: BR-CAP-ACC-PRD-010-04 proved_by: [ATS-ACC-PRD-010-03, ATS-ACC-PRD-010-04, TST-ACC-PRD-006, TST-ACC-PRD-027] statement: >- Up to fifty bands replace the previous collection; empty feature arrays are rejected and an empty setting disables the feature. kind: validation enforced_at: - api - service must_prove: true provenance: test source: >- services-accounting:modules/products/tests/e2e/product-features.e2e.spec.js#switches every feature off with null origin: 'services-accounting:docs/milestones/ACCT-M1-books-and-invoices.md#D12' - id: BR-CAP-ACC-PRD-010-05 proved_by: [] statement: >- Documented responsibility leaves purchase-time discount application to Orders while retaining discount information in the portal projection. kind: policy enforced_at: [] must_prove: false provenance: documented source: 'services-accounting:docs/accounting/products.md#Features (2026-10-16)' origin: none - id: BR-CAP-ACC-PRD-010-06 proved_by: [] statement: The console offers Bulk Pricing only for kinds that permit quantity discounts. kind: policy enforced_at: - console must_prove: false provenance: observed source: 'react-console:components/accounting-config/products/product-common-sections.tsx:ProductCommonSections' origin: none scenarios: - id: SC-CAP-ACC-PRD-010-01 given: A publication offers quantity incentives. when: Staff configure ten percent for 10–49 copies and twenty percent above that. then: Both disjoint bands are accepted. provenance: test source: >- services-accounting:modules/products/tests/unit/rules/product-rules.spec.js#accepts rules that cover no quantity twice, in any order edge_cases: - id: SC-CAP-ACC-PRD-010-02 given: A flat band reduces price by 150 minor units. when: An administrator saves it. then: The amount is accepted without applying a percentage ceiling. provenance: test source: >- services-accounting:modules/products/tests/unit/rules/product-rules.spec.js#accepts a flat amount above 100, which is minor units constraints: [] depends_on: - CAP-ACC-PRD-002 related: - CAP-ACC-PRD-008 journeys: - JNY-ACC-PRD-004 open_questions: [] evidence: - 'react-console:components/accounting-config/products/product-bulk-pricing-section.tsx' - 'react-console:components/accounting-config/products/product-common-sections.tsx' - 'services-accounting:docs/accounting/products.md' - 'services-accounting:docs/milestones/ACCT-M1-books-and-invoices.md' - 'services-accounting:modules/products/aws/api/products.schemas.ts' - 'services-accounting:modules/products/db/product-bulk-pricing-rules.table.ts' - 'services-accounting:modules/products/services/persistence/products.ts' - 'services-accounting:modules/products/services/rules/product-rules.ts' - 'services-accounting:modules/products/tests/e2e/product-features.e2e.spec.js' - >- services-accounting:modules/products/tests/integration/services/persistence/products.features.integration.spec.js - 'services-accounting:modules/products/tests/unit/rules/product-rules.spec.js' controls: [TC-IAM-001, TC-IAM-002, TC-IAM-004, TC-IAM-005, TC-AZ-001, TC-AZ-002, TC-AZ-003, TC-AZ-004, TC-AZ-005, TC-AZ-006, TC-TEN-001, TC-TEN-002, TC-TEN-003, TC-TEN-004, TC-DAT-001, TC-LOG-001, TC-LOG-002, TC-LOG-003, TC-LOG-004, TC-PI-001, TC-PI-003] exercised_by: [FAS-ACC-PRD-03-01, FAS-ACC-PRD-03-02, FAS-ACC-PRD-03-03, FAS-ACC-PRD-03-04, FAS-ACC-PRD-03-05] suites: [TST-ACC-PRD-006, TST-ACC-PRD-027, TST-ACC-PRD-039, TST-ACC-PRD-066] --- # Configure discounts for quantity purchases ## Purpose Finance describes quantity incentives as a set of bands. ## How It Works Finance describes quantity incentives as a set of bands. Each band chooses a percentage or monetary reduction. The boundaries identify which quantities qualify. Saving rejects ranges that run backward or overlap. The console presents those problems before submission where possible. Replacing the product replaces the bands together. An empty setting removes the discount configuration. Accounting stores and validates the instructions; applying the discount to an order belongs to Orders. ## Relationships This outcome uses create a product with a permanent identity.