The Free On-line Dictionary of Computing (30 December 2018):

feasibility study

    Part of the systems develpment life cycle
   which aims to determine whether it is sensible to develop some
   system.  The most popular model of feasibility study is
   "TELOS", standing for Technical, Economic, Legal, Operational,
   Schedule.

   Technical Feasibility: does the technology exist to implement
   the proposed system?  Is it a practical proposition?

   Economic Feasibility: is the system cost-effective?  Do
   benefits outweigh costs?

   Legal Feasibility: is there any conflict between the proposed
   system and legal requirements, e.g. the Data Protection Act?

   Operational Feasibility: are the current work practices and
   procedures adequate to support the new system?

   Schedule Feasibility: can the system be developed in time?

   After the feasibility study, the requirements analysis
   should be carried out.

   (2006-07-11)