Software Module –Construct that consists of procedures and/or data declarations and that can also interact with other such constructs [61508-4 Clause 3.3.5]. Systematic Capability – Measure (expressed on a scale of SC 1 to SC 4) of the confidence that the systematic safety integrity of an element meets the requirements of the specified SIL, in respect of the specified element safety function, when the element is applied in accordance with the instructions specified in the compliant item safety manual for the element [61508-4]. Systematic Failure – Related in a deterministic way to a certain cause, which can only be eliminated by a modification of the design or of the manufacturing process, operation procedures, documentation, or other relevant factors. [IEC 61508-4, Section 3.6.6]. Triggering Condition – System states (conditions) that can manifest a latent software defect and create the potential fora software CCF. Validation – Confirmation by examination and provision of objective evidence that the requirements fora specific intended use are fulfilled. [61508-4 Clause 3.8.2]. Verification – Confirmation by examination and provision of objective evidence that the requirements have been fulfilled [61508-4].
