The roles shown here are not intended to reflect any individual's job description within the company. These roles are, instead, intended to describe the key functions that only impact the various HL7 interfacing processes. A medium-sized corporation will typically have a few people in the role of Field Integration Engineer and comparatively fewer people in the other roles. Start-up companies will typically compress all of the above roles into a single person but should be planning for the day when they grow and these roles get handled by different people.