CHAPTER 5: TYPES OF SERVICE INTEGRATION MODELS
There are three primary types of service integration model that are prevalent in the IT industry, namely:
Internal Service Integrator (ISI)
Where the internal IT function takes the role of service integrator across service providers.
External Service Integrator (ESI)
Where an external service provider is solely focused on performing “SIAM-as-a-Service”, i.e. they provide the integration service but do not provide any tower services.
External Tower Service Integrator (ETSI)
Where an external service provider performs “SIAM-as-a-Service” but also delivers one or more tower services to the customer.
Internal Service Integrator (ISI)
This model has the accountability for integration and aggregation ...
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