It is a four-tier delivery model designed for application support and maintenance outsourcing market. The concept was created for providing clients with the knowledge, expertise and local client relationships of engagement and project managers, backed by global delivery capabilities.

It sounds as a clever approach combining competencies for deploying resources on-site, near-site, near-shore and off-shore (hence the four-tier model). Apparently RIS - a Canadian outsourcing company - chose to open a Solutions Centre in Romania to fill out its model.