System Development Life Cycle SDLC

The term system development life cycle is simply a generic expression for a system implementation process or methodology. Methodologies are central to implementing enterprise software, and every implementer has one. From a cultural perspective, the system development life cycle (SDLC) becomes a language that people within the organization can speak fluently. 

The difficulty is that every organization in the supply chain has its own SDLC and therefore its own language for describing the process. And while it is not exactly necessary for everyone to speak the same language, it is essential that misunderstanding be avoided. 

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If you plan to get into serious applications development, or even if you plan to write comprehensive generic SAS macros, you will want to learn about the systems development life cycle (SDLC). Developed by the Institute of Electrical and Electronics Engineers (IEEE), the SDLC has been the traditional approach to software applications development for a long time. Besides the traditional SDLC, there are many derivative... 

Most of the instruments used in the laboratory are commercial off-the-shelf (COTS) instruments, and consequently the users have little or no input into their design. A full system development life-cycle (SDLC) approach [8], which is used to develop complex computerized systems such as Laboratory Information Management System (LIMS) or Chromatographic Data System (CDS) or custom design laboratory equipment, is not appropriate for COTS instruments. Some laboratory instruments such as a pH meter or centrifuge are fairly simple and therefore do not warrant the SDLC approach. 

FIGURE 20.6 A System Development Life Cycle (SDLC) of a Chromatography Data System. 

Validation of computerized systems differs from the validation processes previously described because of the complexity and key-function in the process controls of such systems. Therefore, computer validation has a special life cycle (system development life cycle [SDLC]) that contains the hardware and the software. The sub-sections of the SDLC are similar to the subsections of the life cycles for prospective/retrospective validation processes. 

Swivel/tilt, of computer screen, 1197-1198 Symantec Visual Caf-126 for Java, 304 Synchronization, sequencing vs., 2036-2037 Synthetic rating scales (time study), 1423 SyRS (systematic random sampling), 1456 System(s). See also specific systems definition of, 280, 489 effectiveness of, 1922 energy, 1574-1575 quality of, 1797 reliability of and effectiveness, 1922 and employee participation, 976 models for, 1932-1937 successful performance/failure of, 1927 tools for viewing, 1809, 1810 Systematic random sampling (SyRS), 1456 Systematic structure of models, 284 System design phase (CIM), 514, 515 System effectiveness (term), 1922 Systems development life cycle (SDLC), 96-106... 

The development and implementation of an information system such as a LIMS follows the traditional system development life cycle (SDLC) shown in Figure 7. Normally, equipment is purchased off-the-shelf and used with little or no modification however, a different approach is necessary with complex laboratory automation such as a robotic system or a LIMS. In this instance, the users must state what tasks they want the system to undertake. Often this places the chemist in a difficult position as he or she... 

I recommend that you follow a more traditional systems development life-cycle model (SDLC) when developing a comprehensive SAS macro-based reporting system. Unlike much of the one-time-only SAS programming that occurs for a clinical trial, you need to ensure that a general-purpose SAS macro system is robust enough to handle any problem it encounters. The systems development life-cycle approach to software development will help you to build strong software applications with SAS. 

Select qualified suppliers who have demonstrated to work according to proper SDLC (System Development Life Cycle) procedures and who supply good validation support. 

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