The pitch for using hosted business applications rather than on-premises software is now familiar: Flexibility, cost savings, access, speed, and the list continues. But still, small and midsize businesses have to answer a simple question when it comes to software as a service (SaaS): Why?

In other words, if it doesn't produce tangible benefits or solve particular business problems: Why bother?

For Schumacher Group, a physician management firm with 900-plus employees and counting, SaaS is both problem-solver and innovation-enabler rather than just an overhyped trend. CIO Doug Menefee said that as much as 85% of the company's processes are now cloud-based.

The company's SaaS surge started with Salesforce.com for customer relationship management. They've since added Google Apps for the 3,000 doctors that Schumacher contracts with, Workday for human resources information systems, and several niche products such as Host Analytics for finance tools. On the infrastructure side of the things, Menefee said he's also beginning to rely more heavily on Amazon's EC2 cloud and Google's App Engine. (For clarity: I'll use SaaS and cloud interchangeably here as umbrella terms for IT functions hosted off-site.)

To be sure, Schumacher Group isn't all-in on cloud. Menefee still runs two multi-million-dollar data centers and around 200 on-premises servers. But the company is coming close: When addressing new business requirements, Menefee said that decision-making and delivery has shifted to between 90% to 95% in favor of off-site.

"As an IT organization, we listen to what the business problem is and then we'll bring on-premises as well as cloud-based solutions to the table," Menefee said in an interview. "Nine times out of 10--and that's probably closer to 9.5 times out of 10--the cloud products are winning today."

Back to the simple question: Why? Those answers might look a bit different for every business; here are Schumacher Group's.

The first reason is geography: Schumacher Group has branch offices around the country, but it's headquartered in Lafayette, La.,--roughly halfway between where Hurricanes Katrina and Rita each made landfall in 2005. "Being a new CIO for the organization, I recognized the susceptibility of our data center," Menefee said.

The second reason: Faster deployment speeds. Menefee attributed the overwhelming lean toward cloud-based technologies to his team's ability to get them up and running much quicker than it would otherwise be able to with on-site options. His department numbers around 50 people, with 10 focused on Web services.

The third reason very much relates to the second: Schumacher Group has been growing rapidly, adding 350 employees since Menefee took the CIO post around six years ago. "With us being a fast-growing company, I wouldn't be able to put in the server infrastructure and the capital investments up front that would scale as quickly as the organization," Menefee said.

The fourth reason follows suit: Frequency of updates and enhancements. Menefee likes getting new features and functionality on a regular basis without strangling his internal resources to do so--not always the case when upgrading on-premises deployments. "It may take me six months to update a SharePoint environment, and that's on my schedule," he said.