---
id: object/codeunit/3687
type: object
title: Codeunit 3687 "Low-Level Code Calculator"
summary: Codeunit 3687 "Low-Level Code Calculator" in Base Application (Microsoft.Inventory.BOM.Tree). 3 public procedures, 1 events. Present since at least BC23, still in BC30, changed in BC24, BC28.
tier: official
language: en
tags:
  - codeunit
  - base application
versions:
  introduced: null
  last_changed: "28"
  deprecated: null
review:
  state: derived
  by: null
  at: null
  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
  pipeline: 0.2.0
  prompts: {}
  input_hash: 673da8c6ff17eed04b8193789fd1660c9908110e79aed25e92342d1747f90fc4
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Manufacturing/ProductionBOM/LowLevelCodeCalculator.Codeunit.al
    title: src/Layers/W1/BaseApp/Manufacturing/ProductionBOM/LowLevelCodeCalculator.Codeunit.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
links:
  learn: []
  objects: []
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
object_type: codeunit
object_id: 3687
name: Low-Level Code Calculator
namespace: Microsoft.Inventory.BOM.Tree
app: Base Application
extends: null
first_version: "23"
last_version: "30"
present_in:
  - "23"
  - "24"
  - "25"
  - "26"
  - "27"
  - "28"
  - "29"
  - "30"
changed_in:
  - "24"
  - "28"
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 14
  events: 1
  subscribers: 0
relations:
  out: 0
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 0
  calls: 5
  called_by: 2
  implements: 0
---

# Codeunit 3687 "Low-Level Code Calculator"

> Codeunit 3687 "Low-Level Code Calculator" in Base Application (Microsoft.Inventory.BOM.Tree). 3 public procedures, 1 events. Present since at least BC23, still in BC30, changed in BC24, BC28.

Base Application · Microsoft.Inventory.BOM.Tree · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Manufacturing/ProductionBOM/LowLevelCodeCalculator.Codeunit.al) · facts from BC29

## Events published

- `OnAfterCalculate()` (integration)

## Procedures

- `Calculate()`
- `Calculate(ShowConfirmation: Boolean)`
- `SuggestToRunAsBackgroundJob()`

Plus 10 local procedures.

## Triggers

OnRun

## Calls

From the extracted call graph of BC29 (graphify-al on the snapshot checkout): calls whose target is known from a declared type or an `Object::"Name"` argument. Interface dispatch and calls through events are not counted, so the list is not complete.

- [Codeunit 3688 "BOM Node"](../codeunit/3688.md) (14 calls: `AddChildToParent → GetKey`, `PopulateFromBOMComponents → CreateForItem`, `PopulateFromBOMComponents → GetKey`, …)
- [Codeunit 3689 "Low-Level Code Parameter"](../codeunit/3689.md) (6 calls: `PopulateFromBOMComponents → ShowDetails`, `PopulateFromItemAndRelatedBOMs → ShowDetails`, `PopulateFromProductionBOMAndLines → ShowDetails`, …)
- [Codeunit 3682 "BOM Tree"](../codeunit/3682.md) (4 calls: `AddChildToParent → AddRelation`, `AddChildToParent → ChildHasKey`, `PopulateFromBOMComponents → ChildHasKey`, …)
- [Codeunit 99000756 "VersionManagement"](../codeunit/99000756.md) (2 calls: `CheckItemProductionBOMIsCertified → GetBOMVersion`, `PopulateFromSKUAndRelatedBOMs → GetBOMVersion`)
- [Codeunit 27 "Confirm Management"](../codeunit/27.md) (1 call: `SuggestToRunAsBackgroundJob → GetResponseOrDefault`)

## Called by

- [Codeunit 4771 "Create Mfg Prod. BOMs"](../codeunit/4771.md) (1 call: `OnRun → Calculate`)
- [Report 152 "Calculate Low Level Code"](../report/152.md) (1 call: `OnInitReport → (object)`)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: BC24, BC28

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). The call sections above are our own, per object, from the BC29 call graph. For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "codeunit", object_name: "Low-Level Code Calculator")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.