August 2018
Beginner
594 pages
22h 33m
English
Content preview from Software Architect's Handbook
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
E-type systems
An E-type, or embedded type, system is modeled after real-world processes and people. The majority of software systems are E-type systems. The term embedded does not mean the software is embedded in some device but rather that the system is embedded in the real world.
An E-type system affects the world it is in, which may create an evolutionary pressure for change. In addition, the world that is being modeled may undergo change. The needs of the business or its users may change, which will require the system to change. E-type systems must evolve in order to remain useful. For these reasons, Lehman's laws of software evolution apply to E-type systems.