Forrester's Total Economic Impact (TEI) analysis methodology measures "not only costs and benefits but also the enabling value of increasing the overall effectiveness of business processes."
Total Economic Impact (TEI) methodology quantifies the full impact of a technology investment by considering four elements of any initiative:
In essence, TEI aims to provide a complete picture of the total economic impact of purchase decisions. (See Appendix A for more details on this methodology)
We have come across various case studies using Total Economic Impact (TEI) to evaluate the business case for infrastructure solutions - implementations, upgrades etc.
This case study uses Forrester's Total Economic Impact (TEI) to evaluate the financial impact of implementing the Sun Ray Virtual Display Terminals. The document shows all calculations and assumptions that go into creating this business case using Total Economic Impact (TEI).