[ZH] Do we need to cover all 15 Scope 3 categories?

[ZH] No - but you need to demonstrate which you have included and why the rest are immaterial. That screening itself is what assurance tests.

[ZH] How often should we recalculate the base year?

[ZH] When a qualitative trigger occurs - major acquisition, divestment, methodology change - per your written policy.

[ZH] ESG / Carbon Accounting

[ZH] GHG Protocol Scope 1, 2 and 3 inventories, base-year recalculation policy and reduction-pathway modelling.

[ZH] Work With Us

[ZH] An eight-week first-year engagement produces an assurance-ready Scope 1-3 inventory.