Folder & Form - Blank spreadsheet column map
Suggested preparation worksheet | folderandform.com
Guide: https://folderandform.com/resources/combine-spreadsheets-with-different-columns

Use supplied, authorized sources. Keep original values and references.

OUTPUT DECISION
Operation (append / join / summary):
What one output row represents:
Output format and recipient specification:
Sources and revisions included:
Source cutoff / excluded sources:
Join key and expected relationship, if relevant:

COLUMN MAPPING - repeat for each source column
Source reference:
Source column name:
Source meaning and type:
Target column name:
Target meaning and type:
Transformation allowed:
Unit, currency or pack basis:
Missing-value rule:
Unresolved question / decision owner:

VALIDATION
[ ] Similar headings were checked for equivalent meaning.
[ ] Identifiers preserve significant zeros and punctuation.
[ ] Dates follow confirmed source conventions.
[ ] Quantities, units and currencies are explicit.
[ ] Missing columns have an agreed representation.
[ ] Unmapped columns have a recorded decision.
[ ] Source references survive the transformation where required.
[ ] Append counts / unmatched join keys / summary traceability checked.
[ ] Multiple matches and material conflicts reviewed.

Checks actually performed and coverage:
Unresolved items:
Map revision and approved by/date: