In our previous blog post, we emphasized the importance of thorough documentation during the requirements phase of product development. Today, we’re expanding on this critical foundation by exploring how cross-functional teams—what we called “interlocks” during my time at Dell—are equally vital to developing comprehensive requirements for any product or service.

Beyond Customer Problems: The Interlock Approach

While understanding customer problems remains the cornerstone of product development, successful products must navigate a complex ecosystem of technical constraints, business objectives, and organizational processes. Cross-functional interlocks provide the framework to capture these multifaceted requirements before development begins.

Key Cross-Functional Partners and Their Contributions

Engineering and Development Teams

The technical feasibility of requirements hinges on regular engagement with engineering teams. These interlocks reveal:

• Technical constraints and limitations
• System architecture considerations
• Performance requirements
• Scalability concerns
• Existing technical debt that may impact implementation

At Spice Sage, our engineering interlocks revealed critical insights about NFC tag integration within our premium glass packaging, informing both our sustainable packaging strategy and technical specifications for our mobile app development.

Quality Assurance

QA interlocks during the requirements phase help identify:

• Testability requirements
• Quality metrics and acceptance criteria
• Potential edge cases and failure points
• Compliance and regulatory considerations
• Test automation requirements

Our quality team’s early involvement helped define precise specifications for our spice blends, including moisture content thresholds, particle size distributions, and shelf-life requirements—critical aspects we may have overlooked without their expertise.

Operations and Supply Chain

These interlocks address the practical aspects of bringing your product to market:

• Manufacturing constraints
• Supplier capabilities and limitations
• Logistics and distribution requirements
• Inventory management considerations
• Cost optimization opportunities

For our subscription service, operations interlocks helped us define realistic delivery windows, package dimensions optimized for shipping efficiency, and supply chain requirements for maintaining freshness during transit.

Legal and Compliance

Early engagement with legal teams helps define:

• Regulatory requirements (industry-specific)
• Data privacy considerations
• Intellectual property protection
• Contract requirements for partners and suppliers
• Risk management protocols

For Spice Sage, these interlocks identified specific labeling requirements for allergen information and country-of-origin disclosures that became critical aspects of our packaging specifications.

Customer Support

Support teams provide invaluable insights into:

• Common user issues with similar products
• Support documentation requirements
• Serviceability considerations
• Knowledge base requirements
• Support process integration

Our support team’s input led to enhanced traceability features in our subscription management system, allowing representatives to quickly access delivery status and subscription history.

Finance

Financial interlocks help define:

• Pricing requirements
• Revenue recognition considerations
• Cost constraints
• ROI expectations
• Financial reporting requirements

These discussions helped shape our subscription pricing model and informed our development priorities based on potential revenue impact.

Information Security

Security interlocks address:

• Data protection requirements
• Authentication and authorization specifications
• Compliance with security standards
• Vulnerability assessment protocols
• Privacy requirements

For our mobile app and web platform, security interlocks helped establish requirements for protecting customer payment information and personal data, influencing our architecture decisions.

The Interlock Process

Effective interlocks aren’t just meetings—they’re structured discussions with clear objectives and outcomes:

1. Preparation: Share draft requirements with stakeholders before meetings
2. Focused Discussions: Target specific requirement categories relevant to each team
3. Documentation: Capture insights, constraints, and additional requirements
4. Integration: Incorporate findings into the master requirements document
5. Validation: Verify with stakeholders that their inputs were correctly captured

Benefits of the Cross-Functional Approach

This comprehensive approach delivers several advantages:

• Fewer Surprises: Early identification of constraints and dependencies
• Realistic Timelines: Better understanding of complexity across functions
• Reduced Rework: Addressing cross-functional requirements upfront
• Organizational Alignment: Shared understanding across teams
• Smoother Launches: Anticipating operational needs before they become critical

Case Study: Spice Sage Subscription Service

Our subscription service provides a clear example of how cross-functional interlocks strengthened our requirements:

• Engineering identified technology options for freshness tracking
• Operations defined packaging specifications for different shipping methods
• Finance helped structure pricing tiers based on cost analysis
• Marketing clarified messaging requirements for the user interface
• Customer Support identified self-service features to reduce support volume
• Legal provided requirements for subscription terms and cancellation policies

These diverse perspectives transformed what would have been a technically-focused specification into a comprehensive blueprint addressing business, operational, and customer experience needs.

Conclusion

While understanding customer problems remains fundamental, cross-functional interlocks ensure your requirements address the full spectrum of considerations needed for successful product development. By engaging diverse teams early in the requirements process, you build a more complete foundation for development and reduce costly adjustments later in the product lifecycle.

In our next post, we’ll explore product marketing interlocks in greater depth, examining how marketing perspectives can shape product requirements to support go-to-market success.

---

Have you implemented cross-functional interlocks in your requirements process? What teams have provided the most valuable insights? Share your experiences in the comments below.