Functional requirement specifications

The functional requirement specification (FRS) and its nearly identical twin, the user requirement specification (URS), is a list of functions and features the device should process. If there are specific needs the customer (user) has then this is the place to include it. The level of specificity may be dependent on the experience the end-user has with dissolution. An experienced dissolution scientist will be sensitive to issues such as cross-contamination or the importance of timing etc. Critical specifications need to be clearly stated since the FRS serves as the starting point of the test plan (discussed in the next section). 

FIGURE 1 Validation phases. URS user requirement specification FRS functional requirement specification DQ, IQ, OQ, PQ design, installation, operational, and performance qualifications SOP standard operating procedure. 

The terms instrument qualification and instrument validation are sometimes used indiscriminately. In this chapter, the term qualification refers to the site preparation and the testing employed to demonstrate that the instrument is properly installed in a suitable environment and the performance meets the predetermined specifications for its intended use. Qualification is a part of the whole validation life cycle. Validation refers to the process to provide assurance that the instrument is suitable for the intended application throughout the lifetime of the instrument. Installation qualification (IQ), operation qualification (OQ), and performance qualification (PQ) are performed to provide evidence that the user requirement specifications (URSs), functional requirement specifications (FRSs), and design qualification (DQs) have been met. The sequence of requirements setting and qualification events as well as the relationships between IQ, OQ, PQ and URS, FRS, and DQ are generally illustrated by the V diagram shown in Figure 2. Installation qualification demonstrates the fulfillment of the DQ. Similarly, OQ demonstrates the fulfillment of the functional requirements and PQ demonstrates the fulfillment of the user requirements. 

Business, system, and functional requirements specification deliverable... 

Specifications typically required for a custom-designed application are known as the URS, functional requirements specification (FRS), and the detailed design specification (DDS). A description of each specification and its function follows. 

Functional requirement specification for your CRS Record document number... 

Functional requirements specification section number Installation specification section number (for COTS) or detailed design specification section number (for non-COTS) Security specification section number... 

Electronic audit trail. Check if the audit trail records events as specified in the functional requirement specifications document. 

Lutters D, Ten Klooster R (2008) Functional requirement specification in the packaging development chain. CIRP Ann Manuf Technol 57(1) 145-148 Miedema J, van der Voort MC, Lutters D, van Houten FJAM (2007) Synergy of technical specifications, functional specifications and scenarios in requirements specifications. In Krause F-L (ed) The future of product development proceedings of the 17th CIRP design conference. Springer, Berlin, pp 235-245... 

ERTMS documentation is a set of European Directives, Technical Specifications for Interoperability (TSI), Functional Requirements Specifications (FRS) and System Requirements Specifications (SRS) fully available on the European Railway Agency (ERA) website (http //www.era.europa.eu)... 

The functional requirements specification for each SRCF shall include, as applicable, following information ... 

Next step in the design process is drawing the functional requirements specification (FRS), also called the physical requirements specification. The FRS documents elaborated demands for connections, heat burden, floor load, acoustic demands, specifications of the walls, HVAC etc. 

Draft functional and technical requirements (Functional Requirement Specification, FRS and Technical Requirement Specification, TRS). 

Safety requirements specification Functional requirements specification Safety integrity requirements specification Design and implementation Installation and commissioning Operations and maintenance Actions by operation personnel Actions by maintenance personnel Changes after commissioning Modification and retrofit De-commissioning... 

These principles were embodied in the Escher Tool, which has been commercially released as the product Perfect Developer. The tool is based around a notation designed for the expression of functional requirements, specifications (of which contracts are a part) and implementation code. 

The elements on the left part are related to the Dynamic Testing phase [8] starting from system Functional Requirements Specifications (FRS), written in natural language, the system dynamic model is manually defined, and the Automatic Test Generation is calibrated on this model. In the ATG phase the Reduction Rules (deriving from the specifications themselves and/or from one s own domain characteristics) are helpful to reduce the number of the tests which have to be executed. The Reduction Rules, indeed, define the input variables which don t affect the output ones therefore, these input variables will be set to default values to test the output ones, saving hence time and costs during the test execution phase [9]. 

For software in industrial control systems, the V-model process in Fig. 2.4 shows that there will typically be a series of nested specifications, from the overall functional requirements specification, through intermediate system specifications, to detailed... 

Thereafter the designers have to identify the necessary barriers and controls for the identified hazards and safety functional requirements. (A barrier or a control, which prevents a hazard is called a safety critical element (SCE).) The barriers and controls will typically consist of a mixture of mechanical barriers, instrumentation and control (I C) systems, and fire-fighting systems, combined with administrative controls. Functional requirement specifications for all the necessary SCEs are then included in the overall design specification. 

International Union of Railways, Project EIRENE— Functional Requirements Specification, 2006. 

The ontology submodel Characteristics (k-ramp-char) supports the definition of specifications with upper and lower specification limits (tolerance ranges of functional requirement specifications or (sub-)product specifications) in general. This submodel makes no restrictions on concepts to be specified—such as, functional requirements, (sub-)products or process segments. It provides reasoning rules for comparing arbitrary concepts (classes) based on the specification limits of their characteristics. 

Realization of safety-related control systems To create safety-related control systems (SRCS) conforming to the safety requirements specification (safety functions requirements specification and safety integrity requirements specification). 

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