Analyze resource quantities including time and environmental impacts

I need the resource usage and emissions summary for the client proposal due Monday. Aggregate machine hours, fuel consumption and CO2 equivalents for Projects A and B for the past 12 months, calculate per‑unit environmental intensity, and attach the assumptions for conversion factors. Send the workbook to Priya, the Sustainability Lead, first to validate the emission factors, then to Marcus, the Project Planner, for inclusion in the proposal, with Monday 9am deadline — confirm Priya signed off.

Before I hand this to Sustainability and Planning, make it easy for reviewers to trust. Put the total CO2 per unit at the top, show the conversion factors with source links, create a column that reconciles machine hours to billed hours, and highlight any projects where fuel use rose over 20% year‑on‑year that would make a reviewer pause.

My monthly environmental summary shows CO2 per unit jumped 18% for Project A in April, but recorded machine hours and billed hours are unchanged. Priya suspects a misapplied conversion factor; Marcus says meter readings didn't change. I'm unsure whether this is a data entry error, a factor update, or a meter fault. What sequence of checks and quick calculations will reveal the most likely cause so I can advise Priya and Marcus?

Each proposal cycle we end up rerunning resource and emissions numbers because someone used different conversion factors or hours. That costs a day per proposal and weakens planning's credibility. Which habit should we change — a single source of truth for factors, sign‑off ownership, or input version control — and what one practice will stop rework without slowing proposal delivery?