Excel weekly dashboards at scale

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name: excel-weekly-dashboard description: Designs refreshable Excel dashboards (Power Query + structured tables + validation + pivot reporting). Use when you need a repeatable weekly KPI workbook that updates from files with minimal manual work.

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Excel weekly dashboards at scale

PURPOSE

Designs refreshable Excel dashboards (Power Query + structured tables + validation + pivot reporting).

WHEN TO USE

TRIGGERS:

- Build me a Power Query pipeline for this file so it refreshes weekly with no manual steps. - Turn this into a structured table with validation lists and clean data entry rules. - Create a pivot-driven weekly dashboard with slicers for year and ISO week. - Fix this Excel model so refresh does not break when new columns appear. - Design a reusable KPI pack that updates from a folder of CSVs.

DO NOT USE WHEN…

- You need advanced forecasting/valuation modeling (this skill is for repeatable reporting pipelines). - You need a BI tool build (Power BI/Tableau) rather than Excel. - You need web scraping as the primary ingestion method.

INPUTS

REQUIRED:

- Source data file(s): CSV, XLSX, DOCX-exported tables, or PDF-exported tables (provided by user). - Definition of ‘week’ (ISO week preferred) and the KPI fields required.

OPTIONAL:

- Data dictionary / column definitions. - Known “bad data” patterns to validate (e.g., blank PayNumber, invalid dates). - Existing workbook to refactor.

EXAMPLES:

- Folder of weekly CSV exports: exports/2026-W02/*.csv - Single XLSX dump with changing columns month to month

OUTPUTS

If asked for plan only (default): a step-by-step build plan + Power Query steps + sheet layout + validation rules.

If explicitly asked to generate artifacts:

- workbook_spec.md (workbook structure and named tables) - power_query_steps.pq (M code template) - refresh-checklist.md (from assets/) Success = refresh works after adding a new week’s files without manual edits, and validation catches bad rows.

WORKFLOW

1. Identify source type(s) (CSV/XLSX/DOCX/PDF-export) and the stable business keys (e.g., PayNumber). 2. Define the canonical table schema: - required columns, types, allowed values, and “unknown” handling. 3. Design ingestion with Power Query: - Prefer Folder ingest + combine, with defensive “missing column” handling. - Normalize column names (trim, case, collapse spaces). 4. Design cleansing & validation: - Create a Data_Staging query (raw-normalized) and Data_Clean query (validated). - Add validation columns (e.g., IsValidPayNumber, IsValidDate, IssueReason). 5. Build reporting layer: - Pivot table(s) off Data_Clean - Slicers: Year, ISOWeek; plus operational dimensions 6. Add a “Refresh Status” sheet: - last refresh timestamp, row counts, query error flags, latest week present 7. STOP AND ASK THE USER if: - required KPIs/columns are unspecified, - the source files don’t include any stable key, - week definition/timezone rules are unclear, - PDF/DOCX tables are not reliably extractable without a provided export.

OUTPUT FORMAT

When producing a plan, use this template:

WORKBOOK PLAN
Sheets:
  - Data_Staging (query output)
  - Data_Clean (query output + validation flags)
  - Dashboard (pivots/charts)
  - Refresh_Status (counts + health checks)
Canonical Schema:
  - :  | Required? | Validation
Power Query:
  - Query 1: Ingest_ (Folder/File)
  - Query 2: Clean_
  - Key transforms: 
Validation rules:
  -  -> 
Pivot design:
  - Rows/Columns/Values
  - Slicers

If asked for artifacts, also output:

assets/power-query-folder-ingest-template.pq (adapted)

assets/refresh-checklist.md

SAFETY & EDGE CASES

Read-only by default: provide a plan + snippets unless the user explicitly requests file generation.

Never delete or overwrite user files; propose new filenames for outputs.

Prefer “no silent failure”: include row-count checks and visible error flags.

For PDF/DOCX sources, require user-provided exported tables (CSV/XLSX) or clearly mark extraction risk.

EXAMPLES

Input: “Folder of weekly CSVs with PayNumber/Name/Date.”

Output: Folder-ingest PQ template + schema + Refresh Status checks + pivot dashboard plan.

Input: “Refresh breaks when new columns appear.”

Output: Defensive missing-column logic + column normalization + typed schema plan.

Input: “Folder of weekly CSVs with PayNumber/Name/Date.”

Output: Folder-ingest PQ template + schema + Refresh Status checks + pivot dashboard plan.

Input: “Refresh breaks when new columns appear.”

Output: Defensive missing-column logic + column normalization + typed schema plan.