Process - LifeCycle (Entity State) (Status)


In a process based model, every entity has a lifecycle (Status) that shows a finite number of distinct states.

The status shows the state of an entity ie:

<MATH> State + Us = Status </MATH>

This process may be implemented/visualized as a finite automata

See also: Data - State



Store Transaction

Non-deterministic Finite automata representing a transaction between a customer, a store and a bank

Every actor needs to make a transition (going from one state to another) when an action is executed. (An action is a label on a arc) (ie it is not possible for the system as a whole to die because the customer automaton has no response to an action)


  • loops on certain states are irrelevant action (ie actions that must be ignored - highlighted in yellow) (To save space the labels were combined onto one arc rather than showing several arcs with the same heads and tails but different labels)
    • for the store: cancel (each of its seven states has a loop labeled cancel)
    • for the bank: pay, ship
    • for the customer: ship, redeem and transfer
  • a customer initiates the following actions: pay, cancel
  • a bank may: redeem, transfer
  • a store may: ship

chapter 2.1.2 - page 55 from Hopcroft, Motwani, Ullman, Automata Theory, Languages, and Computation 3rd Edition. pdf

Jira ticket

Communication Protocol

communications protocols (such as protocols for secure exchange of information, …)

Web Application

Every web application has a lifecycle. Common tasks, such as:

  • handling incoming requests,
  • decoding parameters,
  • modifying and saving state,
  • and rendering web pages to the browser,

are all performed during a web application lifecycle.

Some web application frameworks hide the details of the lifecycle from you, whereas others require you to manage them manually.

Business Process

See business process status

The lifecycle of a web application starts and ends with the following activity:

  • The client makes a request for the web page,
  • and the server responds with the page.

The lifecycle consists of two main phases: execute and render.


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