A service provider is collecting requirements for a cloud-based document storage service. Which is an example of a utility requirement for this service?

In ITIL, 'utility' refers to the functionality offered by a service to meet a particular need, or "what the service does." It is about the service being 'fit for purpose'. For a cloud-based document storage service, a primary function is to provide a defined amount of storage space for users. Therefore, specifying that the service will allow each user 100GB of storage space is a core utility requirement, as it directly describes a key feature and function that the service delivers to the customer.

A. While displaying a list of items is a function, the amount of storage (D) is a more fundamental utility requirement that defines the core offering of a storage service.
B. This describes performance (speed), which is a 'warranty' requirement (fitness for use), not a utility requirement. It defines how well the service performs its function.
C. This is an availability requirement, which is a core component of 'warranty'. It defines when the service can be used, not what it does.

1. AXELOS. (2020). ITIL® 4: Drive Stakeholder Value (DSV). TSO (The Stationery Office).

Section 2.1.2

"Value: outcomes

costs

and risks": This section defines utility as "the fitness for purpose of a service. It is what the service does. It is the functionality that enables a service to have its desired effect." Providing 100GB of storage is a direct example of this functionality.

Section 4.2.2

"Specifying and managing customer requirements": This section distinguishes between functional requirements (utility) and non-functional requirements (warranty). A specific storage capacity is a functional requirement

whereas performance (B) and availability (C) are classic non-functional requirements.

2. AXELOS. (2019). ITIL® Foundation: ITIL 4 Edition. TSO (The Stationery Office).

Section 2.5.1

"Products and services": This section states

"Utility is the functionality offered by a product or service to meet a particular need... To assess the utility of a service

it is important to understand what the service does..." The 100GB storage allocation directly answers "what the service does." In contrast

warranty is defined as "assurance that a product or service will meet agreed requirements

" covering areas like availability

capacity

and performance.