NOVELTY - The designing method involves calculating number of ICE design candidates (402), such that each ICE design candidate comprises two film layers, performing simulation analysis on each ICE design candidate (404), analyzing performance components of each ICE design candidate (406), identifying local optimum for each performance component (408), performing refined simulation analysis around the local optimum for each performance component of ICE design candidate (410), and selecting ICE design candidate for fabrication (412).    USE - Designing method for simplified ICE (claimed) of ICE system used in identifying physical and chemical properties of diverse subsurface and surface fluids in conjunction with developing natural gas wells or hydrocarbon wells for production, monitoring, or injection in relation to recovery of hydrocarbons or other materials from subsurface, including geothermal wells to provide source of heat energy.    ADVANTAGE - Minimizes number of film layers in ICE to reduce cost associated with its design and fabrication without sacrificing quality performance. Quality control is performed to prevent ICE performance degradation during fabrication, and post-manufacturing calibration is applied to enhance implementation of the system.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a method to optimize selection of combination of ICE designs;    (2) a selected ICE combination;    (3) a method for fabricating simplified ICE; and    (4) an information handling system with machine-readable instructions to perform the methods.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart of a method of designing ICE.    Calculating number of ICE design candidates (402)    Performing simulation analysis on each ICE design candidate (404)    Analyzing performance components of each ICE design candidate (406)    Identifying local optimum for each performance component (408)    Performing refined simulation analysis around the local optimum for each performance component of ICE design candidate (410)    Selecting ICE design candidate for fabrication (412)