Fitness Landscape Fitness Landscape SimulationSimulation

Modeling Architecture and Modeling Architecture and Component ResearchComponent Research

Laurent Mirabeau

Igor FeldmanMurat Cokol

Ezra Goodnoe

Innovation TheoryInnovation Theory

• Dominant Design– After a given time a few dominant designs will

emerge. They can be thought as basin of attractions

Dominant Design

Product

Process

Innovation TheoryInnovation Theory

• Architecture Vs Component Innovation– Companies organize around the architecture of

the product they research / manufacture

The ModelThe Model

• One central hub: architecture team• Several peripheral nodes: component teams• Hub decisions impact overall system• Generic network motif

Fitness FunctionFitness Function

ji

ssjisj

si

i

si

si LccccF

,',,,

')(

Create n nodes, initialize values 1-5 utility

Create n*(n-1)*s*s links, initialize random -1<<1

Calculate fitness for points in landscape

Random drop on landscape

Select one-mutant neighbor

Calculate fitness and walk if higher

Iterate, repeat for many agents over several landscapes

ResultsResults

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

0 20 40 60 80 100

Fitness

Iterations

10 Landscapes

100 Agents

500 Iterations

Emergence of Dominant DesignsEmergence of Dominant Designs

Architecture Vs Component

0

0.05

0.1

0.15

0.2

0.25

0.3

1 2-5 6-10 11-20 21-50 51-100 101-500

Iterations

Pro

babi

lity

Arc

Comp

Next StepsNext Steps

• Increase complexity of model by adding dependencies

• Try various strategies – Stochastic process to melt off peaks, Concurrent agents, Increase hamming distance

• Combine several motifs to create new class of problems