Project Manager
Name and create your project. Your project name will appear across all tools as you work through the Controlled Convergence process.
Project Name
Owner
Description
Saved Projects
Saved Templates
STU
STU
Controlled Convergence Coach

AI Coaching Coming Soon...

Quick Start
Jump straight in — the matrix updates as you type.
Switch to Guided Mode for structured coaching, ility weighting, and PDF export.
Requirements (rows)

No requirements yet. Click + Add.

Concepts (columns)
Baseline Concept

No additional concepts yet. Click + Add.

Pugh Matrix Score each concept vs. datum: better (+), same (0), worse (−)

Add requirements and concepts above to see the matrix.

Make Better Design Decisions

A structured methodology for evaluating design concepts against real engineering requirements — objectively, systematically, and collaboratively.

Quick Start: jump straight to a matrix  |  Guided Mode: full structured workflow

The Controlled Convergence Workflow
1
Goal Statement
Define what you're designing, for whom, and under what constraints.
→
2
Ilities
Select the quality dimensions that matter most to your design.
→
3
Stakeholders
Identify who is affected by and who influences the design.
→
4
Requirements
Capture specific, measurable engineering requirements.
→
5
Pairwise
Rank requirements by relative importance through pairwise comparison.
→
6
Score
Score each design concept against the datum for every requirement.
→
7
Pugh Matrix
Visualize which concepts dominate and converge on the best design.
Objective Evaluation
Eliminate gut-feel decisions. Score concepts against an agreed datum using a weighted matrix.
Iterative Convergence
Weak concepts are eliminated. Strong concepts are hybridized. The best design emerges.
Defensible Results
Export a full audit trail — requirements, scores, and matrix — ready to present to stakeholders.
Goal Statement
Define what you are trying to accomplish before you decide how you are going to accomplish it.
Statement Mode:
TO Solution-neutral intent
BY Solution-specific function
USING Converged solution
WHILE Constraint or condition
STU
STU
Controlled Convergence Coach

AI Coaching Coming Soon...

Reviewing your statement
› Bibliography & Further Reading
Primary Sources
Pugh, S. Total Design: Integrated Methods for Successful Product Engineering. Addison-Wesley, 1991.
Ulrich, K.T. & Eppinger, S.D. Product Design and Development. McGraw-Hill, 6th ed., 2015.
Pahl, G. & Beitz, W. Engineering Design: A Systematic Approach. Springer, 3rd ed., 2007.
Related Methodology
Otto, K. & Wood, K. Product Design: Techniques in Reverse Engineering and New Product Development. Prentice Hall, 2001.
Cross, N. Design Thinking: Understanding How Designers Think and Work. Berg Publishers, 2011.
Further Reading
de Weck, O.L., Ross, A.M., Rhodes, D.H. "Investigating Relationships and Semantic Sets amongst System Lifecycle Properties (Ilities)." CESUN 2012, TU Delft, June 2012.
de Weck, O.L., Roos, D., Magee, C. Engineering Systems: Meeting Human Needs in a Complex Technological World. MIT Press, 2012.
Ilities
Select the system lifecycle properties relevant to your design. These become the categories your requirements are written against and the axes of your pairwise comparison.
0 of 26 selected
STU
STU
Controlled Convergence Coach

AI Coaching Coming Soon...

Stakeholders
Select the stakeholders relevant to your project. These will be used for traceability in your requirements. Every requirement can be linked to the who it serves or affects.
0 selected
STU
STU
Controlled Convergence Coach

AI Coaching Coming Soon...

Requirements
Write requirements and classify them by type, ility, and stakeholder. The coverage charts can help you spot gaps in your requirements.
Type
Requirement Statement
Primary Ility *
Secondary Ility
Primary Stakeholder
Secondary Stakeholder
No requirements yet. Add your first one above.
Coverage by Ility
Coverage by Stakeholder
STU
STU
Controlled Convergence Coach

AI Coaching Coming Soon...

Pairwise Comparison
Compare your ilities head-to-head to establish their relative weight in the Pugh Matrix.
Weighting Method:
0 of 0 pairs
Assume all requirements have been met at the minimum acceptable level. Which ility would you spend extra time, resources, or money on?
vs
STU
STU
Controlled Convergence Coach

AI Coaching Coming Soon...

Concept Scoring
Add the design concepts you want to evaluate. The first concept becomes the Datum — your fixed baseline. Score each additional concept requirement by requirement, relative to the Datum.
Add your first concept above. It will become the Datum — the baseline all other concepts are compared against.
STU
STU
Controlled Convergence Coach

AI Coaching Coming Soon...

Pugh Matrix
Your requirements, ilities, and concept scores in one view. Concepts that outscore the Datum on high-weight requirements are your strongest candidates to converge on.
Go to SCOR and add at least two concepts to build the matrix.
STU
STU
Controlled Convergence Coach

AI Coaching Coming Soon...