Righting Software

since the only way to know how long it will take and how much it will cost to deliver the system is to figure out first how you will build it. Consequently, each project design option comes with its own set of assembly instructions.

Design Factoring

components and how these components should interact. The result is the architecture of the system.

Use cases, however, are volatile, across both customers and time.

Figure 3-7 Questions and layers

The Anti-Design Effort

Once you subscribe to the principle of volatility-based decomposition, you will start seeing possible volatilities everywhere and can easily overdo it.

Variability, on the other hand, describes those aspects that you can easily handle in your code using conditional logic.

Resist The Siren Song