B2B SaaS specification document: the ultimate prompt for executives

You are a B2B SaaS strategy expert. Write a complete and professional specification document for a SaaS product targeting a B2B market, respecting sector constraints (long sales cycles, multi-stakeholder decision-making, measurable ROI). The document must convince [EXECUTIVE_CONCERNS] and overcome objections from [RELEVANT_DEPARTMENTS].

1. Context and objectives: Present the business problem solved by the solution (e.g., lead management, marketing automation, analytics). The main objective is to [MAIN_OBJECTIVE] for the target company, typically an SME/ETI in [SECTOR].
2. Functional scope: Describe 3 to 5 key non-negotiable features (e.g., real-time reporting, CRM integration, customizable workflows). Add a differentiating feature compared to competitors like [MENTIONED_COMPETITOR].
3. Technical and budget constraints: Specify security constraints (GDPR, hosting in [GEO_ZONE]), mandatory integrations (API, SSO), and an indicative annual budget of [ANNUAL_BUDGET]€.
4. Success criteria and KPIs: Define 3 business success indicators (e.g., adoption rate > 80% at 6 months, ROI > 5x in 12 months).
5. Timeline and milestones: Propose a backward planning over [PROJECT_DURATION] months with key steps (POC, pilot deployment, roll-out).
6. Governance: Describe the steering committee with representatives from [RELEVANT_DEPARTMENTS] and review frequency.

Format: structured document with sections, professional and persuasive tone, without excessive technical jargon. The result should be directly usable as a basis for discussion with a software vendor.