Writing requirements before you start shopping, rather than discovering them reactively while comparing vendor feature pages, keeps your evaluation grounded in genuine need rather than being shaped by whatever a particular vendor happens to emphasize in their marketing.

Why Order Matters Here

If you start by browsing vendor websites, your sense of what’s “standard” or “important” gets shaped by how vendors have chosen to position their own products — which reflects their competitive strategy, not necessarily your actual needs. Writing requirements first, independent of any specific vendor’s framing, protects against this subtle bias.

Step 1: Gather Input From Actual Future Users

Talk to the people who will actually use the system daily — not just leadership or whoever’s managing the purchase. Their perspective on what would genuinely help versus what would just add friction is essential and often differs from what a purchase decision-maker assumes matters most.

Step 2: Separate Functional Requirements From Non-Functional Requirements

Functional requirements describe what the system needs to do — track deals, send automated follow-ups, generate specific reports. Non-functional requirements describe how it needs to perform — reliability, ease of use, mobile accessibility, security standards. Both categories matter, and conflating them tends to produce a requirements list that’s strong on features but weak on the practical qualities that determine whether people actually use the system well.

Step 3: Write Requirements as Specific, Testable Statements

Avoid vague statements like “needs good reporting.” Write specific, verifiable requirements instead: “must support building a custom report filtering deals by stage, owner, and date range.” A specific requirement can be directly tested during a trial; a vague one can’t be meaningfully verified at all.

Step 4: Prioritize Ruthlessly

Categorize each requirement as must-have, important, or nice-to-have. Resist the temptation to mark everything as must-have — a requirements list where everything is critical provides no real differentiation when comparing vendors against it.

Step 5: Include Constraints, Not Just Desired Capabilities

Document hard constraints alongside desired features — budget ceiling, required integrations, compliance requirements, deployment preferences. These constraints often eliminate candidates faster and more decisively than feature comparison alone.

A Requirements Documentation Template

Category	Requirement	Priority	Testable?
Functional	Must support custom pipeline stages matching our process	Must-have	Yes — verify during trial
Functional	Must generate weekly pipeline report by rep	Must-have	Yes — verify during trial
Non-functional	Mobile app must support core daily tasks with full feature parity	Important	Yes — test hands-on
Constraint	Budget ceiling of [your specific figure] per year	Must-have	Yes — verify with vendor quote
Constraint	Must integrate natively with our email platform	Must-have	Yes — verify during trial

Common Requirements-Gathering Mistakes

Writing requirements based on what a previous CRM did, without questioning whether those features were actually valuable. Carrying forward assumptions from a prior system without re-examining them can perpetuate past mismatches rather than genuinely starting fresh from current need.

Gathering input from only one stakeholder group. Requirements gathered only from sales leadership, without input from the actual sales reps who’ll use the system daily, tend to overweight reporting and oversight capability relative to daily usability.

Treating the requirements document as finished once written. Requirements should be revisited and refined as you learn more during vendor research and trials — the initial document is a strong starting point, not an immutable final specification.

Frequently Asked Questions

How detailed should a requirements document be for a small business? Detailed enough to be genuinely testable and specific, even for a small purchase — a short document with five to ten specific, well-written requirements is more useful than a longer, vaguer one. Depth of specificity matters more than document length.

Who should be responsible for writing the final requirements document? One person should own compiling and finalizing it, even though input should come from multiple stakeholders, to ensure the document is coherent and genuinely prioritized rather than an uncoordinated list reflecting whoever contributed last.

How do requirements differ for a first-time CRM purchase versus a replacement? A replacement should explicitly include requirements addressing whatever drove the need to switch — if the prior system failed on integration reliability, that becomes an explicit, heavily weighted requirement this time, not just one item among many.

Should requirements be shared with vendors, or kept strictly internal? Sharing your core requirements with vendors, particularly during RFP processes, is common and can help vendors respond more specifically to your actual needs rather than giving a generic pitch — covered in more depth in companion guidance on CRM RFP templates.

What happens if no vendor meets all your must-have requirements? This is useful information worth taking seriously — either your must-have list needs honest reconsideration (was something genuinely not essential?), or the market genuinely doesn’t have a perfect fit and you’ll need to weigh trade-offs explicitly rather than assuming a perfect match exists somewhere unexamined.

Should requirements documents differ by department if multiple teams will use the CRM? Capture department-specific requirements as their own distinct section within one overall document, rather than either forcing a single generic list to cover every team’s needs or creating entirely separate, disconnected documents that make it hard to see the full picture and reconcile any conflicting needs across teams.

How should requirements handle features that are genuinely hard to evaluate without hands-on trial, like reporting flexibility? Write the requirement as specifically as possible even if it’s hard to verify from documentation alone, and flag it explicitly as something that must be confirmed during trial rather than taken on faith from a vendor’s description — this ensures it doesn’t get quietly skipped during evaluation just because it’s harder to check than a simple yes/no feature.

Next Step

Schedule brief conversations with at least three people who’d actually use the CRM daily, and compile their input into the template above before you look at a single vendor’s website — this ordering is what keeps the requirements genuinely yours, not shaped by vendor marketing.