Enactment:

The process enactment phase encompasses the actual run time
of the business process. Business process instances are initiated to fulfil the
business goals of a company. Initiation of a process instance typically follows
a defined event, for instance, the receipt of an order sent by a customer.
The business process management system actively controls the execution
of business process instances as defined in the business process model. Process
enactment needs to cater to a correct process orchestration, guaranteeing that
the process activities are performed according to the execution constraints
specified in the process model.
A monitoring component of a business process management system visualizes
the status of business process instances. Process monitoring is an important
mechanism for providing accurate information on the status of business
process instances. This information is valuable, for instance, to respond to a
customer request that inquires about the current status of his case.
Detailed information on the current state of process instances are available
in a business process management system. , the states and
state transitions of activity instances are investigated, while it covers
process instances. State information can be used to visualize and monitor
process instances. Visualization techniques can be based on colours, so that,
for instance, an enabled activity is shown in green, a running instance is
marked in blue, and a completed process instance is represented in grey. Most
business process management systems provide monitoring information that is
based on states of active business processes.
During business process enactment, valuable execution data is gathered,
typically in some form of log file. These log files consist of ordered sets of log
entries, indicating events that have occurred during business processes. Start
of activity and end of activity is typical information stored in execution logs.
Log information is the basis for evaluation of processes in the business process .