Authors: Bruce Guptill, Mike West, Bill McNee

Already entering its third wave, Software-as-a-Service (SaaS) is now spreading throughout the enterprise, delivering mission-critical solutions well beyond the basic software functionality of first-wave SaaS offerings. In just a few short years, SaaS has evolved from simple subscription-based application solutions at the margins – email, web conferencing, and CRM -- to offering core application solutions such as HR, Finance, BI and Procurement, as well as IT infrastructure solutions delivered as cloud-based services.  In this sense, SaaS has been steadily moving from the edges to the core, and in another few years will increasingly bring ERP, Supply Chain and GRC solutions to the enterprise.

On-demand infrastructure solutions are evolving and maturing even faster than SaaS solutions have. IT-as-a-Service spans more than networks, raw compute and storage capabilities to include systems management solutions, security, mobile device management, performance management, problem management, configuration/change management, vendor SLA compliance monitoring, and capacity planning.

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