Control by Design, L.L.C. is a company specialized in design and troubleshooting of Instrumentation, Electrical and Analytical control systems. This includes all phases of design and drafting. Our primary focus group is the Petro-Chemical Industry and related industries. We offer complete design and programming assistance with DCS, PLC and safety shutdown systems(TMR). Control by Design, L.L.C. is conveniently located on the Mississippi Gulf Coast and can provide services to locations ranging from West Florida through Louisiana.