State progression for normal, standard, and emergency changes

Each change request model progresses through a number of state values in a specific order.

Table 1. Normal change state progression
	State	Can be canceled?	Diagram
1.	New	Yes	Figure 1. Normal change state model
2.	Assess	Yes
3.	Authorize	Yes
4.	Scheduled	Yes
5.	Implement	Yes
6.	Review	Yes
7.	Closed	No

Table 2. Standard change state progression
	State	Can be canceled?	Diagram
1.	New	Yes	Figure 2. Standard change state model
2.	Scheduled	Yes
3.	Implement	Yes
4.	Review	Yes
5.	Closed	No

Table 3. Emergency change state progression
	State	Can be canceled?	Diagram
1.	New	Yes	Figure 3. Emergency change state model
2.	Authorize	Yes
3.	Scheduled	Yes
4.	Implement	Yes
5.	Review	Yes
6.	Closed	No