Building a TPRM Security Questionnaire That Vendors Will Actually Answer

The Questionnaire Paradox

Every question you add to a vendor security questionnaire improves your risk visibility. But every question also reduces the likelihood that the vendor will complete it thoroughly. This is the TPRM questionnaire paradox: comprehensive assessments produce fatigue, incomplete responses, and delayed timelines. The solution is intelligent questionnaire design that maximizes signal while minimizing noise.

Standard Frameworks vs. Custom Questionnaires

SIG (Standardized Information Gathering)

The SIG questionnaire, maintained by Shared Assessments, is the most widely recognized standard. The full SIG contains 800+ questions across security domains. SIG Lite offers a reduced set for lower-risk vendors. Benefits: widely recognized by vendors, reduces questionnaire fatigue for vendors assessed by multiple clients.

CAIQ (Consensus Assessments Initiative Questionnaire)

CSA's CAIQ is designed for cloud service providers, covering cloud-specific security domains.

Custom Questionnaires

Custom questionnaires allow you to focus on your specific risk concerns but increase the burden on vendors who must complete unique questionnaires for every client. Best used as supplemental to standard frameworks.

Key Question Domains

Regardless of framework, your questionnaire should cover:

• Governance: Security policies, leadership, compliance programs, certifications.
• Access management: Authentication, authorization, privileged access, MFA.
• Data protection: Encryption, classification, retention, deletion.
• Network security: Firewalls, segmentation, intrusion detection, monitoring.
• Vulnerability management: Patching cadence, penetration testing, vulnerability scanning.
• Incident response: IR plan, notification process, breach history.
• Business continuity: BCP/DR plans, testing frequency, recovery objectives.
• Third-party management: How the vendor manages its own sub-processors and fourth parties.
• Privacy: GDPR compliance, DPA availability, data subject rights support.

Evidence Requirements

Questions alone are insufficient. Require supporting evidence for critical controls:

• SOC 2 Type II report (or equivalent certification)
• Penetration test executive summary
• Insurance certificate (cyber liability)
• Incident response plan table of contents
• Data flow documentation for your data

Scoring Methodology

Convert questionnaire responses into a quantitative risk score:

• Weight questions by domain importance and risk impact.
• Define acceptable, marginal, and unacceptable score thresholds.
• Flag critical deficiencies that require remediation before onboarding.
• Use scoring trends to track vendor improvement over time.

Improving Completion Rates

• Tier-based length: Shorter questionnaires for lower-risk vendors.
• Accept existing reports: Let vendors submit recent SOC 2 or ISO 27001 reports in lieu of answering duplicate questions.
• Clear instructions: Provide guidance for each question to reduce back-and-forth.
• Reasonable timelines: Allow 2-4 weeks for completion.

Jerisaliant's TPRM module offers configurable questionnaire templates with tier-based question sets, evidence upload, automated scoring, and vendor portal with progress tracking.