"Field","Supported baseline","Proposed change","Evidence affected / next action"
"Lettuce type and cultivar","","","MANUAL; identify actual lettuce"
"Intact or fresh-cut product form","","","MANUAL; cut-surface quality evidence cannot automatically cover whole heads"
"Product mass per package and unit","","","MANUAL; identify fill relative to evaluated pack"
"Effective film area and unit","","","MANUAL; retain basis supplied by packaging specialist"
"Material, thickness, openings and seals","","","MANUAL; exact package construction, no design prescription"
"Oxygen transmission and test conditions","","","MANUAL; retain units and test basis, not a gas-mixture target"
"Carbon-dioxide transmission and test conditions","","","MANUAL; distinguish from oxygen and water vapor"
"Gradient-dependent transfer paths","","","MANUAL; direction for each gas depends on conditions inside and outside"
"Tissue respiration process","","","MANUAL; O2 consumption and CO2 production continue; separate from film transfer"
"Water-vapor transmission evidence","","","MANUAL; moisture performance does not prove gas performance"
"Product-temperature history and route","","","MANUAL; measured product history, not room display alone"
"Opening or retail stage","","","MANUAL; identify change in package boundary or handling"
"Validation no longer covering proposal","","","MANUAL; identify changed assumptions and needed packaging/postharvest review"
"Separate food-safety review","","","MANUAL; responsible specialist and scope; appearance is not microbiological validation"
"Use","MANUAL, no formulas or film-design calculator. Import UTF-8 comma CSV, widen columns, wrap text and save a copy. Compare baseline and proposal; name affected evidence. No gas recipe, hole pattern, shelf-life extension or lot-release decision.","","MANUAL; no formulas or automatic approval"
"Source context","https://www.postharvest.net.au/postharvest-fundamentals/atmosphere/modifying-the-atmosphere/ ; https://postharvest.ucdavis.edu/produce-facts-sheets/lettuce-crisphead ; https://www.fda.gov/media/117526/download","","Source interpretation and limits are explained in the accompanying article."