| Single and sole sources | Critical items with one supplier, or with only one supplier that exists | Purchase data, the approved supplier list, suppliers' own sources | NIST SP 800-161 Rev. 1: “overreliance on a single source of supply” |
| Concentration | A high share of an item from one country, region, port or supplier, or shared tier 2 sources | The supply chain map, country of manufacture, shipping routes | Practice: this template's check |
| Stock cover and recovery time | Weeks of stock against the time to qualify and switch to another source | Stock reports, lead times, qualification times | Practice: this template's check |
| Financial health | Filed accounts, credit rating, late filings, insolvency notices, early warning signs | Companies House, The Gazette, SEC EDGAR, a credit report | Practice: this template's check |
| Ownership and sanctions | Who owns and controls the supplier, and matches on the sanctions lists that apply to you | Ownership records, a sanctions screen | Your sanctions obligations |
| Continuity | The supplier's continuity plan, alternative sites, recovery time and last test | A plan summary and test record from the questionnaire | NIST SP 800-161 Rev. 1: include critical suppliers in contingency planning |
| Cyber and information security | What the supplier holds or can reach, its controls, its sub-contractors, incident support | Cyber Essentials, an ISO/IEC 27001 certificate, a SOC 2 report, questionnaire answers | NCSC supply chain security guidance (12 principles); NIST SP 800-161 Rev. 1 |
| Labour and human rights | Forced and child labour, recruitment fees, unsafe conditions, grievance channels | Country, sector and material risk, codes of conduct, social audit reports | Modern Slavery Act 2015 s.54(5)(d); for US imports, the UFLPA presumption |