Full Turnkey Execution This well known formula has been provided on many occasions by De Smet Engineers & Contractors (DSEC), ensuring its client the execution of new investment or intervention in an existing facility within a pre-established time frame and budget. Full turn-key is the true guarantee of maximum efficiency in investment implementation with minimum intervention from the investor side. Even though fully defined from the very beginning, turn-key contracts allow constant monitoring and possible modifications during execution thanks to pre-established change order procedures, giving therefore the investor the flexibility he needs to adapt his production tool to new market requirements during the construction phase.