Clash Matrix Methodology
A structured, systematic approach to coordinating building systems and resolving conflicts.
Ad-hoc clash detection processes often miss critical conflicts and lack accountability for resolution. Our clash matrix methodology implements a comprehensive, strategic approach to identifying and resolving conflicts between all building systems.
The clash matrix creates a structured framework that ensures no system combinations are overlooked, appropriate tolerances are applied to each comparison, and resolution responsibilities are clearly defined—delivering more reliable coordination outcomes.
What is a Clash Matrix?
A clash matrix is a structured framework that organizes and prioritizes clash detection testing between different building systems:
- Systematic Pairings - The matrix defines which systems will be checked against each other, ensuring comprehensive coverage of all potential conflict areas.
- Custom Tolerances - Each system pairing can have specific tolerance settings based on the nature of the systems and coordination requirements.
- Prioritization Rules - The matrix establishes hierarchies and precedence rules for conflict resolution, determining which systems take priority.
- Responsibility Assignment - It clearly defines which team members or disciplines are responsible for resolving specific types of clashes.
- Process Workflow - The matrix establishes the sequence and timing of clash tests throughout the project lifecycle.
Components of Our Clash Matrix
System Classification
We organize building elements into logical system groupings based on discipline, function, and resolution responsibility. This classification ensures that all elements are included in appropriate clash tests.
Test Pairing Matrix
We define which systems will be tested against each other, with a rationale for each pairing. Some systems may not need testing against each other due to physical separation or other factors.
Tolerance Settings
We establish appropriate tolerance values for each system pairing, determining the minimum clearance required between elements. These tolerances account for installation requirements, access needs, and system flexibility.
Resolution Hierarchy
We establish the priority order for systems in conflict situations. For example, structural elements typically have higher precedence than MEP systems, and gravity-dependent systems like drainage often have priority over others.
Responsibility Matrix
We clearly define which team members or disciplines are responsible for resolving specific types of clashes, eliminating ambiguity in the resolution process.
Testing Schedule
We establish the timing and frequency of clash tests throughout the project lifecycle, ensuring coordination occurs at optimal points in the design and construction process.
Our Matrix Implementation Process
Project Assessment
We analyze your project scope, complexity, and specific requirements to determine the appropriate level of clash matrix detail.
Matrix Development
We create a customized clash matrix document that defines all system classifications, test pairs, tolerances, and responsibilities.
Team Orientation
We review the clash matrix with all project stakeholders to ensure understanding and buy-in from all disciplines.
Software Configuration
We set up automated clash detection rules in Navisworks or other coordination platforms that implement the defined matrix parameters.
Execution & Refinement
We conduct clash detection according to the matrix and refine the approach based on project-specific findings and feedback.
Matrix Example
| System vs. System | Structural | Architectural | HVAC | Plumbing | Electrical | Fire Protection |
|---|---|---|---|---|---|---|
| Structural | — | Hard (0mm) Arch. to adjust |
Hard (0mm) HVAC to adjust |
Hard (0mm) Plumb. to adjust |
Hard (0mm) Elec. to adjust |
Hard (0mm) FP to adjust |
| Architectural | ↑ | — | Soft (50mm) HVAC to adjust |
Soft (50mm) Plumb. to adjust |
Soft (50mm) Elec. to adjust |
Soft (25mm) FP to adjust |
| HVAC | ↑ | ↑ | — | Hard (100mm) Negotiate |
Hard (100mm) Elec. to adjust |
Hard (150mm) Negotiate |
| Plumbing | ↑ | ↑ | ↑ | — | Soft (150mm) Elec. to adjust |
Soft (150mm) FP to adjust |
| Electrical | ↑ | ↑ | ↑ | ↑ | — | Soft (200mm) Negotiate |
| Fire Protection | ↑ | ↑ | ↑ | ↑ | ↑ | — |
High Priority Test Medium Priority Test Low Priority Test No Test Required Inherited from Above
Note: This simplified example shows a basic clash matrix. Actual project matrices typically include more detailed system breakdowns, specific tolerance values, and more nuanced resolution responsibilities.
Benefits of a Structured Matrix Approach
Our clash matrix methodology delivers significant advantages over ad-hoc coordination:
Comprehensive Coverage
Ensures all relevant system combinations are checked, eliminating blind spots in the coordination process.
Focused Effort
Concentrates coordination resources on the most critical and problematic system interfaces rather than treating all clashes equally.
Clear Process
Establishes a documented, repeatable workflow that guides the team through coordination with clear expectations and responsibilities.
Reduced Disputes
Minimizes disagreements about clash resolution by establishing clear hierarchy and responsibility rules upfront.
Progress Tracking
Facilitates clear monitoring of coordination progress against a structured framework, making reporting more effective.
Related Services
Implement a Structured Coordination Approach
Stop relying on ad-hoc clash detection. Contact us to discuss how our clash matrix methodology can bring structure, efficiency, and reliability to your project coordination process.