Businesses of all sizes and in all industries use Managed Services for a variety of different reasons.  Small to medium size companies use MSPs to provide full IT services so they can focus on their core business and maintain operational cost control.  Larger companies may use an MPS to augment the in house IT staff, having the MSP handle the more day to day tasks freeing up resources to complete more strategic projects.  Companies that need 24x7x365 monitoring and alert will engage an MSP to assist with that coverage.