  The software development life cycle (SDLC) is a procedure used to develop a
software system that meets both the customer s needs and real-world
requirements. The first phase of the SDLC involves creating a conceptual model
that represents the involved domain in reality. In requirements engineering,
building such a model is considered a bridge to the design and construction
phases. However, this type of model can also serve as a basic model for
identifying business processes and how these processes are interconnected to
achieve the final result. This paper focuses on process modeling in
organizations, per se, beyond its application in the SDLC when an organization
needs further documentation to meet its growth needs and address regular
changes over time. The resultant process documentation is created alongside the
daily operations of the business process. The model provides process
visualization and documentation to assist in defining work patterns, avoiding
redundancy, or even designing new processes. In this paper, a proposed
diagrammatic representation models each process using one diagram comprising
five actions and two types of relationships to build three levels of depiction.
These levels consist of a static description, events, and the behavior of the
modeled process. The viability of a thinging machine is demonstrated by
re-modeling some examples from the literature.
