> ## Documentation Index > Fetch the complete documentation index at: https://docs.firstresonance.io/llms.txt > Use this file to discover all available pages before exploring further. # Build readiness aBOM reference > Column definitions for the aBOM dashboard and its CSV export in ION Analytics. The **aBOM** tab in Build Readiness shows the installation status of every part in your as-built BOMs, with cost rollups and issue counts per component. Each row is one required part within one top-level serialized assembly. To open the dashboard, go to **Analytics > Build Readiness > aBOM**. ## Filters **Part Number**: narrows all KPIs, charts, and table rows to a single top-level assembly part number. Selecting a part number resets the **Rev** and **Serial** filters. **Rev**: further narrows to a single revision of the selected assembly. Resets the **Serial** filter. **Serial**: further narrows to a single serialized instance of the selected assembly. **Hide root nodes**: when enabled, hides the row where the part is the top-level assembly itself, so the table shows only child components. ## Sub-tabs The aBOM tab contains two sub-tabs sharing the same filters: * **aBOM**: the full installation detail table with cost and linkage columns. * **Issues**: filtered to only rows that have at least one issue, with the same column set. ## KPI cards | Card | What it shows | | --------------- | ------------------------------------------------------------------------------------------------- | | Total Cost | Sum of `TOTAL_COST` across all rows in the current filter. | | Total Parts | Number of distinct top-level assembly instances in the current filter. | | Fully Installed | Number of assembly instances where `IS_FULLY_INSTALLED` is true, and the percentage of the total. | | Open Issues | Sum of `OPEN_ISSUE_COUNT` across all rows. | The **Issues** sub-tab shows two additional cards: **Open Issues** and **Total Issues** for the filtered set. ## Table columns | Column | Export field | Description | | ---------------- | ------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Top Level Part | `TOP_LEVEL_PART_NUMBER` | The part number of the top-level serialized assembly this row belongs to. | | Top Level Rev | `TOP_LEVEL_REVISION` | The revision of the top-level assembly. | | Top Level SN | `TOP_LEVEL_SERIAL_NUMBER` | The serial number of the top-level assembly instance. | | Top Level Status | `TOP_LEVEL_STATUS` | The inventory status of the top-level assembly (the same status values used across ION inventory). | | Level | `MIN_LEVEL` | The BOM level of this component (0 = the top-level assembly itself). | | Parents | `PARENTS` | The parent assemblies of this component in the aBOM hierarchy. Expand the cell to see each parent's part number, revision, trace, level, and path. | | Required Part | `REQUIRED_PART` | The part number required at this position in the aBOM. | | Required Rev | `REQUIRED_PART_REVISION` | The revision of the required part as specified in the aBOM. | | Sourcing | `SOURCING_STRATEGY` | How the part is sourced: **buy** (purchased) or **make** (manufactured in-house). | | Installed Part | `INSTALLED_PART` | The part number of the inventory unit that was actually installed. | | Installed Rev | `INSTALLED_PART_REVISION` | The revision of the installed part. | | Installed Trace | `INSTALLED_PART_TRACE` | The serial or lot number of the installed inventory unit. | | Req Qty | `TOTAL_REQ_QUANTITY` | The total quantity required at this BOM position. | | Installed Qty | `INSTALLED_QUANTITY` | The quantity that has been installed. | | Installed | `IS_FULLY_INSTALLED` | Whether the required quantity at this position has been fully installed. | | BOM Cost | `PART_COST` | The cost of this part as defined in the part library. | | Unit Cost | `UNIT_COST` | The cost recorded on the part inventory line. | | Avg Cost | `AVG_COST` | The average cost of this part across purchase orders. | | Total Cost | `TOTAL_COST` | The total cost for this row, based on the installed quantity and unit cost. | | Open Issues | `OPEN_ISSUE_COUNT` | The number of open issues linked to this component. | | Total Issues | `TOTAL_ISSUE_COUNT` | The total number of issues linked to this component, including closed ones. | | Linked Runs | `LINKED_RUNS` | Runs associated with this component. Expand the cell to see run ID, status, and due date. | | Linked POs | `LINKED_POS` | Purchase order lines associated with this component. Expand the cell to see PO number, position, quantity, cost, line status, PO status, and estimated arrival. | | Installed At | `INSTALLED_TIME` | The timestamp when this component was installed. | ## Export The **aBOM** sub-tab and the **Issues** sub-tab each have their own export. Click **Export** in the table toolbar to download the current view as a CSV. Both exports respect all active filters; the Issues export additionally filters to rows with at least one issue. ## Related * [Build readiness](/automate-with-ion/analytics/build-readiness) * [Build readiness plans reference](/automate-with-ion/analytics-and-dashboards/build-readiness-plans) * [Build readiness mBOM reference](/automate-with-ion/analytics-and-dashboards/build-readiness-mbom)