To satisfy the growing demand for customised solutions, companies struggle to balance flexible system engineering with short lead time and profitability. This struggle has driven the development of variability management (VM) techniques. VM aims to combine the scale economies of mass production with the flexibility of mass customisation. To achieve that goal, VM ties product information and processes to a variability model. This variability model centralises the variability distributed across the product line, and drives product configuration. The centralised management of product variants is a key enabler for systematic reuse, which is a prerequisite for scale economies. During this presentation, I will introduce the concept of variability model, and show how this model can be used to check, diagnose and fix issues in product specification and configuration.

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