Wikipedia
VPEC-T analysis is a thinking framework comprising a collection of mental filters or guides. It provides a "simplified ‘language’ for preventing loss in translation from business needs to IT solutions" and is used when analyzing the expectations of multiple parties having different views of a system in which they all have an interest in common, but have different priorities and different responsibilities. System, here is used in the broad sense of a set of interacting or interdependent entities, real or abstract, forming an integrated whole. It is applied to 'systems' that range from those as small as a performance appraisal, to ones as large as a criminal justice system.
VPEC-T ("vee-pec-tee") is used where interaction between agents and communication between parties can easily result in ambiguity. This form of analysis is particularly applicable where it is likely that the interaction and communication context is unordered, complex or chaotic, and liable to result in misunderstanding. It is identified as a new way of carrying out Enterprise Architecture, and also identified as a way to design services.
VPEC-T was first conceived as a framework to aid those studying information systems, where the conflicting viewpoints of the parties involved could be a barrier to proper understanding. Examples of such situations are frequently found at the business/information technology (I.T.) divide. Since the 1990s, I.T. has stolen the place of Information Systems but I.S. and I.T. are not the same. I.T. is about computers and programs. I.S. encompasses everything that will surround I.T. for the tasks to be properly completed - people, processes and information.