what is product line architectures



Concepts

A product line architecture (PLA) captures variation among a set of closely-related products. This involves modeling both the commonality among products in a product line as well as the variability that exists between them. PLA’s often capture different products with different features.

Product populations are entirely different products for which similar changes may need to be applied. The opposite of product line architectures; this involves modeling the common changes for products in a product population in addition to the individual products themselves.

Features in product line architecture may exhibit different types of relationships, such as conflicting with each other, being dependent on each other, or independent.

Techniques

Model variability using change sets. Borrowing from the concept of intensional versioning in the configuration management community, variability among product line architectures can be modeled using change sets, which are composed together to produce individual product architectures.

Model feature compatibility using change set relationships. To aid an architect in composing valid product architectures, relationships model feature compatibility and feature composition relationships among change sets.

Model variation with variable architectural elements and Boolean guards. Another way of modeling a product line architecture is to model optional and variant elements with Boolean guards that are evaluated when selecting out an individual architecture. [LEGACY]

Tools

EASEL Extensible Architecting Support Environment with Layers
Boolean Guards, Selector, Pruner Models product line architectures using optional, variant, and optional variant architectural elements.
PLA Diff and Merge Creates a diff between two architecture descriptions that may be merged into another architecture description


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