Software
Features/Benefits
- Data Collection
- Proof Test Program
- Minimize Configuration Time by Reusing the Design Documentation and Results
- Flexible System Architecture Supports Effective Use by Engineering, Operations, and Maintenance Personnel
Data Collection
Evaluation of achieved risk reduction begins with the creation of a program for capturing operation and maintenance data (events) for plant equipment. SILStat supports the capture, documentation, and classification of the following “life events” in a format that is compatible with the Center for Chemical Process Safety (CCPS) Process Equipment Reliability (PERD) database level 2.- Demands
- Proof test results
- Maintenance activities
- Failures
SILStat Event Database
New life events can be recorded automatically or manually on-demand for a specific piece of equipment. Events can originate from an engineering station or from a mobile application. It is possible to document the results of a process demand; including what hazardous situation occurred and the effectiveness of each associated layer of protection. The event database can also record auxiliary information such as the SAP Work Order Number, which authorized and scheduled a maintenance activity like a proof test.SILStat Event Viewer
All data is stored on a dedicated data server for centralized access. Events can be reviewed and analyzed through SILStat’s event viewer, which provides powerful sorting and filtering capability to identify performance trends. It can also be used to calculate actual demand rates (initiating frequency), failure rates, and probability of failure on demand (PFD) for devices and layers of protection.Proof Test Program
Proof tests are a key activity during operation and maintenance, done periodically based on design performance requirements such as the expected level of risk reduction. When it comes to safety instrumented functions, the higher the safety integrity level (SIL) the more frequent, rigorous, and costly the proof test.SILStat provides the following capabilities to improve the effectiveness of the plant’s proof test program and minimize cost:
Proof test procedure generator:
- Create templates for organizing and reusing proof tests
- Export the proof tests created by the conceptual design engineer in exSILentia during the up-front design of the risk reduction scheme
- Customize these procedures as necessary (e.g., add measurable pass / fail criteria) for execution by maintenance personnel
- Use version control to organize proof test documents and manage changes to them.
Proof test recorder:
- A mobile application that allows operation and maintenance personnel to view and execute proof tests electronically in the field from a wireless handheld device or tablet
- Optional Bluetooth scanner allows appropriate proof test procedure to be called up automatically by scanning QRA code
- All recorded data and observations are sent to a centralized server for storage and review
Review / Evaluate Results:
- Proof test results can be reviewed and evaluated automatically and immediately
- The data server compares the collected proof test data to the pre-defined pass/fail criteria that was defined in the proof test procedure
- Additional comments can be added to the test results and events added to the log (e.g., device requires repair and replacement)
Minimize Configuration Time by Reusing the Design Documentation and Results
Much of the required SILStat configuration can be built automatically from the design documentation developed as part of the Analysis and Realization phases. This not only reduces application setup time cost, but also improves traceability between safety system design and operation & maintenance. SILStat has two main interfaces for engineering and configuration of the database:Plant Hierarchy
Represents the layout of actual plant equipment by unit / equipment / device / component. Definition of safety instrumented functions including (Tag / addresses) can be created manually or automatically from the results of SIL Verification documented in exSILentia’s SILver tool. Definition of non-SIS protection layers (such as alarms and relief valves) can be created manually or automatically from SIL target selection results documented in exSILentia’s SILect tool.Hazard Scenario Editor
Presents each defined hazard with its associated layers of protection, which are shown in order of activation (which one should trigger first, second, etc.). Hazard definitions can be created manually or automatically from SIL target selection results documented in exSILentia’s SILect tool.Flexible System Architecture Supports Effective Use by Engineering, Operations, and Maintenance Personnel
The SILStat tool is designed to support applications ranging in scope from a single site up to corporate-wide. It consists of the following components:SILStat Server - A common repository for proof test procedures, failure and demand data, and proof testing results which can be accessed by multiple users.
SILStat Workstation - Computer with software tools installed for configuration of the plant hierarchy, hazard scenarios, and proof test procedures as well as for system administration. This also can be used for the documentation of failures, demands, and events.
SILStat Recorder - A mobile application running on a handheld device or tablet that can be used to execute proof tests, record proof test results, as well as document failures, demands, and events. It also allows plant documentation (Wiring schematic, P&IDs) etc. to be accessed remotely.
Screen Shots
