Step-by-step explanation:
i. Arrival variability: Customers do not want service at same time or in other words they have different needs at different times. The company can arrange for appointment method.
ii. Request variability: The requirement of customer differ from person to person so better to have different types of skilled employees to satisfy the customer need.
iii. Capability variability:
This is important to hand-hold customer according to the need.
iv. Effort variability:
Depending on the customer, the effort also varies.
v. Subjective preference variability:
A customer demand cannot be satisfied all time and neglected all time.
Example: A restaurant menu cannot keep changing, depending on the maximum request, there will be a change.
Understand from above terms, the company must satisfy the customer and can also reduce the variability but it should show any damage in service experience.