Operix01 / CONTEXT
Common challenges
- Files are copied every month and multiple workbooks are aggregated manually
- Only one person can repair complex formulas or macros
- Column or filename changes stop processing without a clear cause
- Version conflicts, input errors, and duplicate updates are increasing
02 / SCOPE
Scope of support
We do not assume Excel must be removed. We separate its roles in input, calculation, review, and output, inspect the real files and exceptions, and select a method the organization can operate and maintain.
- Inventory of files, sources, outputs, users, and dependencies
- Comparison of Power Query, VBA, Power Automate, scripts, APIs, and systems
- Implementation with validation, exception handling, logging, and safe reruns
- Acceptance tests using normal, boundary, and invalid data
- Operating, recovery, change, and handover documentation
Use cases
- Combining sales and inventory files from multiple locations
- Batch creation of invoices, estimates, and reports
- CSV transformation, code conversion, and pre-import checks
- Saving email attachments, updating registers, and notifying owners
How we work
- Review actual files, runtime environment, users, and peak periods
- Inventory inputs, formulas, macros, links, and exceptions
- Compare approaches and build a small prototype
- Test normal, boundary, invalid, and rerun scenarios
- Complete user acceptance and access configuration
- Release, explain operation, rehearse recovery, and agree change ownership
Who this is for
- Teams burdened by weekly or monthly Excel work
- Companies that want gradual improvement while retaining useful files
- Organizations replacing person-dependent macros with maintainable operation
03 / HANDOVER
Deliverables
Deliverables are agreed for the project scope.
- 01Automation tool or workflow
- 02Input/output specification and dependency map
- 03Test cases and results
- 04Operating, recovery, change, and handover guide
04 / IMPLEMENTATION
Implementation considerations
Separate the roles of the workbook before automating
When one workbook acts as an input screen, database, calculator, approval record, and report, the impact of a change becomes difficult to predict. We separate source data, transformation rules, review results, and outputs, then identify the system of record.
Personal file paths, manually changed cells, hidden sheets, external links, and named ranges are documented as dependencies. Handover requires the execution conditions, not only working code.
Compare Power Query, VBA, Power Automate, and a system
Microsoft describes Power Query as technology for connecting, importing, and shaping data. It is a strong option for standard CSV consolidation and column transformations, but complex approval and concurrent editing can be difficult to keep inside one workbook.
VBA is useful for repetitive Office operations. Runtime devices, macro policy, signing, maintenance, and recovery still need owners. Where history, access control, or multiple services are involved, we also compare Power Automate, APIs, and a business system.
| Method | Suitable scope | Confirm first |
|---|---|---|
| Formulas and tables | Calculation and input assistance in one workbook | Validation, protection, calculation ownership |
| Power Query | Importing, shaping, and combining data | Column names, types, sources, credentials |
| VBA or Office Scripts | Batch Office actions and document creation | Runtime, access, maintenance owner |
| Power Automate or RPA | Email, files, web, approvals, multiple apps | Connections, licensing, failure handling |
| API or business system | Multiple users, history, permissions, stable operation | Integration contract, monitoring, ownership |
Test more than the happy path
Tests include blanks, duplicates, encoding, overflow, dates, added columns, missing files, denied access, and network interruption. A failed run must be safely repeatable without duplicate registration or sending.
Production logging records success and failure reasons, manual intervention, duration, and final reviewer while avoiding unnecessary personal or confidential data.
Define completion as a transferable operation
Completion means a person other than the developer can operate the workflow, explain the input contract and errors, and recover from backup. A clear change-request owner and test process reduce disruption when responsibilities change.
05 / FAQ
Frequently asked questions
Can we keep our existing workbook?
Often yes. We first identify the system of record and separate input, calculation, and output before deciding what stays and what changes.
Do you propose methods other than VBA?
Yes. We compare Power Query, Office Scripts, Power Automate, RPA, scripts, APIs, and business systems against the operating conditions.
Can confidential data be handled?
We confirm information classification, storage, access, logs, backups, and whether any data is sent outside the organization before implementation.
Can you repair only a broken macro?
Yes, but we also confirm dependencies, runtime, expected output, and the handover scope so the same failure is less likely to recur.
06 / REFERENCES
References
Check current official documentation when assessing methods and operating conditions.
- MicrosoftPower Query documentation ↗
- MicrosoftGetting started with VBA in Office ↗
- MicrosoftUse flows with Excel ↗
- Information-technology Promotion Agency, JapanCybersecurity guidelines for SMEs, version 4.0 ↗