1. A system to provide a computer generated safety instrumented system model for managing a process safety lifecycle for a safety instrumented system (SIS) in a facility, wherein the computer generated safety instrumented system model has at least one instrumented protective function (IPF), and wherein the system comprises: a. a processor; b. a data storage connected to the processor that engages a network to communicate with at least one client device having a user; c. computer instructions in the data storage forming a component library for the facility; d. computer instructions in the data storage forming an assembly library for the facility with each assembly having a test interval specification; e. computer instructions in the data storage forming the assembly-component relationship table, wherein the component library and the assembly library enable the assembly-component relationship table to depict a relationship between one of the assemblies and at least one component and to provide a purpose for each component in each assembly; f. computer instructions forming an assembly group library for the facility in the data storage; g. computer instructions to form an assembly group-assembly relationship table in the data storage, wherein the assembly group library and the assembly library enable the assembly group-assembly relationship table to depict a relationship between at least one assembly group and at least one assembly and to provide a parameter for each assembly; h. computer instructions forming an instrumented protective functions (IPF)s library for the facility in the data storage; i. computer instructions to form an instrumented protective function-assembly group relationship table in the data storage, wherein the instrumented protective function library and the assembly groups library enable the instrumented protective functions-assembly group relationship table to depict a relationship between at least one instrumented protective function and at least one assembly group, forming a safety instrumented system (SIS) with at least one instrumented protective function creating a real world model of the instrumented protective function (IPF); j. computer instructions in the data storage to assign a tag name to at least one component identifier and to assign at least one voting instruction to at least one assembly identifier and at least one assembly group identifier, creating the computer generated safety instrumented system model with a functional specification and a physical specification for all of the instrumented protective functions (IPF) for the facility in real time; k. computer instructions in the data storage to execute safety integrity level (SIL) calculations using: i. the safety integrity level (SIL) calculation engine; ii. each component of the facility with a tag name with voting instructions; iii. the functional specifications for each IPF; iv. the physical specifications for each IPF; v. user entered assumptions for each IPF; vi. wherein the SIL calculations identify and verify that the SIL calculations are met simultaneously for each IPF: 1. an average probability of failure on demand for the IPF, and 2. architectural constraint requirements for the (IPF); and vii. wherein the system using the computer instructions in the data storage in real time, compares actual safety integrity levels achieved at the facility determined by the computer generated safety instrumented system model to user specified safety integrity levels and identifies gaps between an actual safety integrity levels and user specified safety integration levels for the facility.