Infrastructure as an on-demand service provides the ultimate in convenience. Whether accessed via public or private cloud infrastructure or using a hybrid approach, it eliminates the need to purchase servers, software, data-centre space, and network equipment, while providing storage, multi-user access, and operating systems in a fully-outsourced manner. IaaS is also an economical way to obtain the services you need because it allows for dynamic scaling, and a variety of pricing models.

Where IaaS should be used?

• When capital expenditures are limited, making operating expenditures the priority
• If hardware scaling may be difficult due to rapid organisational growth
• For specific business, trial or temporary infrastructure needs
• When demand is characterised by frequent highs and lows

When IaaS May Not be the Best Option

Although IaaS is advantageous when scalability and quick provisioning are desirable, in some instances, its limitations may be problematic.

• When existing on-site/dedicated infrastructure can already meet organisational needs
• Where offshoring/outsourcing data storage and process can be difficult due to regulatory compliance issues