Amey-Thakur Spreadsheet automation
Automation removes the repetitive part of spreadsheet work and can entrench a process that should have moved to a real system. Both considerations belong in the decision.
Method
- Automate the repeated, not the one-off. The setup cost only pays back on recurring work, and most spreadsheet tasks are genuinely one off.
- Prefer built-in features to scripting. Power Query, tables, and dynamic formulas solve most problems without code that only one person understands (see power-query).
- Keep scripts small and named clearly. Long recorded macros are unmaintainable, and rewriting the recording into explicit steps pays for itself.
- Never hardcode ranges. Scripts referencing fixed cells break the moment a row is inserted, which is the most common macro failure.
- Make scripts idempotent. Running twice should not duplicate work, since a partial run followed by a rerun is the normal case (see idempotency).
- Handle errors visibly. A script failing silently mid-way leaves the sheet in an unknown state, which is worse than stopping loudly.
- Recognise when to leave the spreadsheet. Multi-user, scheduled, or data-critical processes belong in an application (see spreadsheet-modeling).
Boundaries
Macro security restrictions block scripts in many organisations. Scripts are typically written by one person and become unowned when they leave. Automation of a bad process makes it faster rather than better (see operations-management).