This is your static brand zone.
Use SUMIFS or PivotTables to group costs by service type (oil change, brake service, transmission flush). Add labor – also optionally linked to currency if your mechanics’ wages depend on imported tools.
Build a small dashboard with dropdowns:
Excel’s Scenario Manager (under Data > What-If Analysis) lets you toggle all rates at once.
# Example: Model definition (model.yaml)
model:
name: "SalesCommission"
inputs:
- name: "revenue"
type: "float"
cell: "B2"
- name: "quota"
type: "float"
cell: "B3"
formulas:
- name: "commission_rate"
expression: "IF(revenue >= quota, 0.15, 0.05)"
target_cell: "B4"
- name: "commission"
expression: "revenue * commission_rate"
target_cell: "B5"
The Model Deviz Service Auto Excel approach transforms Excel from a risky end-user tool into a resilient, auditable enterprise asset. By externalizing logic into a model-driven service and automating workbook generation, organizations eliminate formula drift, enable CI/CD for spreadsheets, and maintain Excel's usability as the frontend. Future work includes integrating with Copilot/LLMs to generate models from natural language. model deviz service auto excel
Let’s say you buy oil filters from Germany at €12.00. Your local currency is CZK.
Without the model, you might miss that 9.60 CZK difference. On 100 filters, that’s 960 CZK lost margin. This is your static brand zone
With the model, your service price (e.g., “Oil change – parts”) updates automatically the moment you refresh the rate.
Excel is ubiquitous in finance, supply chain, and data analytics. Yet, traditional spreadsheets are inherently fragile: a single misplaced formula or manual data entry error can break critical workflows. The core problem is that logic is embedded directly in the user interface (cells). Without the model, you might miss that 9
Solution: Treat Excel not as an application, but as a view layer of a broader model-driven system. By externalizing formulas, validation rules, and data mappings into a service layer, we can auto-generate error-free Excel files and automate their execution.
| Aspect | VBA/Macros | MDD + Auto-Excel Service |
| :--- | :--- | :--- |
| Logic storage | Inside .xlsm (binary) | Version-controlled text files (JSON/YAML) |
| Debugging | Step-through IDE | Unit tests on model |
| Multi-version | Merge conflicts common | Git-friendly diffs |
| Performance | Single-threaded | Parallel service execution |
| Audit trail | Manual | Full service logs + lineage |