From a cost standpoint, there are less expensive alternatives in home-based freelance bookkeepers and accountants. However, these individuals have less flexibility in ***handling workload spikes***. Cambridge has sufficient manpower resources to minimize excessive delays in processing workloads...
http://www.cambridgefinancial.ca/whycambridge.asp

Another technique that works well for ***handling workload spikes*** — such as Web servers that experience cyclical swings in usage — is to add more VMs [virtual machines] as needed...
PDF! http://www.novell.com/collateral/4622025/4622025.pdf

Offshoring initiatives are usually focused on saving money, but domestic outsourcing allows smaller companies to make use of strong talent without having to hire employees. This gives them an incredible amount of flexibility to ***handle workload spikes***, and it allows them to have expertise in areas in which their in-house staff doesn't have experience...
http://www.findtechinsights.com/date,1137906000000,113799240...

The Deputy Program Manager... Oversees the occasional assignment of additional hours to ***handle workload spikes*** as well as the coordination of new tasks and projects.
http://listserv.arizona.edu/cgi-bin/wa?A2=ind0508&L=jobops&T...

Note: another alternative target term (with fewer google hits) is "managing workload spikes."

http://www.google.com/search?hl=en&q="handle workload spikes...
http://www.google.com/search?hl=en&q="manage workload spikes...