verb
determine
dih-TUR-min/dɪˈtɜːrmɪn/
To establish something definitely.
The technician runs several tests to determine the cause of the leak.

Etymology
To mark something off with boundaries is to make its limits definite. This image extended to settling a question or decision, and then to finding a definite answer.
In context
preparing a timeline and timelines are good they help us to determine the events or the chain of events that occurred and that led up to the incident
More examples
- Investigators determined that the fire started in the kitchen.
- We need to determine which repairs come first.
- The amount of sunlight determines how quickly these plants grow.
Forms
determine · determines · determined · determining
determination noun — The process of establishing something definitely.