Safety Instrumented Function (SIF) is a safety function with specified Safety Integrity Level (SIL) implemented by SIS to ensure the safe operation of a process. Pre-determined guidelines are used to allow a process to continue or to enter a safe state if said guidelines are violated. The hazard and risk assessments identify the need for Independent Protection Layers (IPLs) to bring the risks associated with the various hazard scenarios in line with corporate risk tolerance guidelines. Where one or more IPLs are determined to be SIFs aeSolutions has the experience and expertise to: - Confirm the SIL required for the SIF to avoid overdesign - Create a preliminary design for the SIF that conforms to ISA/IEC 61511 - Identify the failure rates and parameters needed to calculate the Probability of Failure on Demand (PFD) of the SIF - We use the most appropriate tool for calculating PFDs (or use the tool the client requires); for complex SIFs we can use Fault Tree Analysis for the calculations - Optimize the SIF to meet the desired proof test interval and spurious trip frequency - Recommend specific field devices for the SIF - Document the calculations including the data and parameters used Acronyms & Terms Glossary <- More Definitions Safety Instrumented Function SIF Safety Instrumented Function (SIF) is a safety function with specified Safety Integrity Level (SIL) implemented by SIS to ensure the safe operation of a process. Pre-determined guidelines are used to allow a process to continue or to enter a safe state if said guidelines are violated. The hazard and risk assessments identify the need for Independent Protection Layers (IPLs) to bring the risks associated with the various hazard scenarios in line with corporate risk tolerance guidelines. Where one or more IPLs are determined to be SIFs aeSolutions has the experience and expertise to: - Confirm the SIL required for the SIF to avoid overdesign - Create a preliminary design for the SIF that conforms to ISA/IEC 61511 - Identify the failure rates and parameters needed to calculate the Probability of Failure on Demand (PFD) of the SIF - We use the most appropriate tool for calculating PFDs (or use the tool the client requires); for complex SIFs we can use Fault Tree Analysis for the calculations - Optimize the SIF to meet the desired proof test interval and spurious trip frequency - Recommend specific field devices for the SIF - Document the calculations including the data and parameters used Our Services Whitepaper: Six Feet Under | How to Dig Yourself Out of a Recommendations Graveyard Have you felt buried under six feet of safety study recommendations that must be closed? Does it feel impossible to follow Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) to convert recommendations into engineered design reality? You are not alone. The PHA Recommendation Playbook | Part 3 | Managing Scheduling and Operational Disruptions Scheduling and operational disruptions are among the most common barriers to closing PHA recommendations. When safety improvements require outages or process changes, timing becomes the challenge. This article explores how facilities can plan ahead, manage risk, and turn scheduling constraints into long-term operational resilience. Understanding UL 508A Certified Control Panels | Enabling Safer, More Resilient Industrial Facilities UL 508A certified control panels give industrial facilities a clear path to safer, code-compliant operation. This article explains what the standard covers, how SCCR is established, what changed in 2025, and why working with a certified panel shop helps reduce risk, streamline inspections, and support long-term maintainability.

The Risk Reduction Factor (RRF) is the inverse of PFD (RRF = 1/PFD) and is used to establish the associated Safety Integrity Level (SIL) rating required for a Safety Instrumented Function (SIF) to reduce the hazard risk to an acceptable risk tolerance level. Once a Process Hazard Analysis (PHA) has been completed and Independent Protection Layers (IPL) have been applied, any SIF that serves as an IPL must have an established RRF. Over-specification of devices to be used in a SIF is not uncommon because it is a SAFETY Instrumented Function. However, over-specification does not necessarily improve safety significantly and can reduce the resources available for overall safety. aeSolutions can help you identify the best devices to use in SIFs and assist you in the purchasing process. Acronyms & Terms Glossary <- More Definitions Risk Reduction Factor (RRF) The Risk Reduction Factor (RRF) is the inverse of PFD (RRF = 1/PFD) and is used to establish the associated Safety Integrity Level (SIL) rating required for a Safety Instrumented Function (SIF) to reduce the hazard risk to an acceptable risk tolerance level. Once a Process Hazard Analysis (PHA) has been completed and Independent Protection Layers (IPL) have been applied, any SIF that serves as an IPL must have an established RRF. Over-specification of devices to be used in a SIF is not uncommon because it is a SAFETY Instrumented Function. However, over-specification does not necessarily improve safety significantly and can reduce the resources available for overall safety. aeSolutions can help you identify the best devices to use in SIFs and assist you in the purchasing process. Our Services Whitepaper: Six Feet Under | How to Dig Yourself Out of a Recommendations Graveyard Have you felt buried under six feet of safety study recommendations that must be closed? Does it feel impossible to follow Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) to convert recommendations into engineered design reality? You are not alone. The PHA Recommendation Playbook | Part 3 | Managing Scheduling and Operational Disruptions Scheduling and operational disruptions are among the most common barriers to closing PHA recommendations. When safety improvements require outages or process changes, timing becomes the challenge. This article explores how facilities can plan ahead, manage risk, and turn scheduling constraints into long-term operational resilience. Understanding UL 508A Certified Control Panels | Enabling Safer, More Resilient Industrial Facilities UL 508A certified control panels give industrial facilities a clear path to safer, code-compliant operation. This article explains what the standard covers, how SCCR is established, what changed in 2025, and why working with a certified panel shop helps reduce risk, streamline inspections, and support long-term maintainability.

Shutdown logic refers to the programmed sequences and conditions under which a system or process will automatically shut down to prevent unsafe situations. This logic is embedded in safety systems to ensure quick and reliable response during emergencies. Acronyms & Terms Glossary <- More Definitions Shutdown Logic Shutdown logic refers to the programmed sequences and conditions under which a system or process will automatically shut down to prevent unsafe situations. This logic is embedded in safety systems to ensure quick and reliable response during emergencies. Our Services Whitepaper: Six Feet Under | How to Dig Yourself Out of a Recommendations Graveyard Have you felt buried under six feet of safety study recommendations that must be closed? Does it feel impossible to follow Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) to convert recommendations into engineered design reality? You are not alone. The PHA Recommendation Playbook | Part 3 | Managing Scheduling and Operational Disruptions Scheduling and operational disruptions are among the most common barriers to closing PHA recommendations. When safety improvements require outages or process changes, timing becomes the challenge. This article explores how facilities can plan ahead, manage risk, and turn scheduling constraints into long-term operational resilience. Understanding UL 508A Certified Control Panels | Enabling Safer, More Resilient Industrial Facilities UL 508A certified control panels give industrial facilities a clear path to safer, code-compliant operation. This article explains what the standard covers, how SCCR is established, what changed in 2025, and why working with a certified panel shop helps reduce risk, streamline inspections, and support long-term maintainability.

Basis for engineering, operation, or maintenance activities and are themselves based on established codes, standards, published technical reports, or recommended practices or similar documents. Acronyms & Terms Glossary <- More Definitions Recognized and Generally Accepted Good Engineering Practice (RAGAGEP) Basis for engineering, operation, or maintenance activities and are themselves based on established codes, standards, published technical reports, or recommended practices or similar documents. Our Services Whitepaper: Six Feet Under | How to Dig Yourself Out of a Recommendations Graveyard Have you felt buried under six feet of safety study recommendations that must be closed? Does it feel impossible to follow Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) to convert recommendations into engineered design reality? You are not alone. The PHA Recommendation Playbook | Part 3 | Managing Scheduling and Operational Disruptions Scheduling and operational disruptions are among the most common barriers to closing PHA recommendations. When safety improvements require outages or process changes, timing becomes the challenge. This article explores how facilities can plan ahead, manage risk, and turn scheduling constraints into long-term operational resilience. Understanding UL 508A Certified Control Panels | Enabling Safer, More Resilient Industrial Facilities UL 508A certified control panels give industrial facilities a clear path to safer, code-compliant operation. This article explains what the standard covers, how SCCR is established, what changed in 2025, and why working with a certified panel shop helps reduce risk, streamline inspections, and support long-term maintainability.

Dormant or standby operation where the IPL takes action only when a process demand occurs and is otherwise inactive. Low demand mode occurs when the process demand frequency (i.e., when the IPL is challenged) is less than once per year. Low demand mode of an IPL is considered during Process Hazard Analyses (PHAs) conducted by aeSolutions' trained facilitators. PHAs help companies identify hazard scenarios that could lead to a release of highly hazardous chemicals that can cause negative impact on people, the environment, and property. Acronyms & Terms Glossary <- More Definitions Low Demand Mode Dormant or standby operation where the IPL takes action only when a process demand occurs and is otherwise inactive. Low demand mode occurs when the process demand frequency (i.e., when the IPL is challenged) is less than once per year. Low demand mode of an IPL is considered during Process Hazard Analyses (PHAs) conducted by aeSolutions' trained facilitators. PHAs help companies identify hazard scenarios that could lead to a release of highly hazardous chemicals that can cause negative impact on people, the environment, and property. Our Services Whitepaper: Six Feet Under | How to Dig Yourself Out of a Recommendations Graveyard Have you felt buried under six feet of safety study recommendations that must be closed? Does it feel impossible to follow Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) to convert recommendations into engineered design reality? You are not alone. The PHA Recommendation Playbook | Part 3 | Managing Scheduling and Operational Disruptions Scheduling and operational disruptions are among the most common barriers to closing PHA recommendations. When safety improvements require outages or process changes, timing becomes the challenge. This article explores how facilities can plan ahead, manage risk, and turn scheduling constraints into long-term operational resilience. Understanding UL 508A Certified Control Panels | Enabling Safer, More Resilient Industrial Facilities UL 508A certified control panels give industrial facilities a clear path to safer, code-compliant operation. This article explains what the standard covers, how SCCR is established, what changed in 2025, and why working with a certified panel shop helps reduce risk, streamline inspections, and support long-term maintainability.

Also known as the Boiler Control System (BCS) The subsystem of instrumentation and controls that manages the firing rate and air/fuel ratio of the burner in response to load demand. The Combustion Control System works in conjunction with the Burner Management System (BMS). aeSolutions' family of products includes industrial Combustion Control Systems in several packages. The pre-engineered packages are configurable to meet the client's operational requirements and is readily configured to implement a variety of fuel-saving optimization techniques, including fully metered / cross-limited fuel air control with oxygen trim, and interfacing to a wide variety of field sensors, analyzers, and valves. The CCS is often supplied as an integrated Combustion Management System package, which includes a BMS for safe startup, shutdown, and interlocking. Acronyms & Terms Glossary <- More Definitions Combustion Control System (CCS) Also known as the Boiler Control System (BCS) The subsystem of instrumentation and controls that manages the firing rate and air/fuel ratio of the burner in response to load demand. The Combustion Control System works in conjunction with the Burner Management System (BMS). aeSolutions' family of products includes industrial Combustion Control Systems in several packages. The pre-engineered packages are configurable to meet the client's operational requirements and is readily configured to implement a variety of fuel-saving optimization techniques, including fully metered / cross-limited fuel air control with oxygen trim, and interfacing to a wide variety of field sensors, analyzers, and valves. The CCS is often supplied as an integrated Combustion Management System package, which includes a BMS for safe startup, shutdown, and interlocking. Our Services Whitepaper: Six Feet Under | How to Dig Yourself Out of a Recommendations Graveyard Have you felt buried under six feet of safety study recommendations that must be closed? Does it feel impossible to follow Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) to convert recommendations into engineered design reality? You are not alone. The PHA Recommendation Playbook | Part 3 | Managing Scheduling and Operational Disruptions Scheduling and operational disruptions are among the most common barriers to closing PHA recommendations. When safety improvements require outages or process changes, timing becomes the challenge. This article explores how facilities can plan ahead, manage risk, and turn scheduling constraints into long-term operational resilience. Understanding UL 508A Certified Control Panels | Enabling Safer, More Resilient Industrial Facilities UL 508A certified control panels give industrial facilities a clear path to safer, code-compliant operation. This article explains what the standard covers, how SCCR is established, what changed in 2025, and why working with a certified panel shop helps reduce risk, streamline inspections, and support long-term maintainability.

The process of engineering safety systems or the engineering of safety systems. A safety instrumented system (SIS) is a collection of hardware and software controls that are specifically designed for use on critical process systems. Acronyms & Terms Glossary <- More Definitions SIS Engineering Definition The process of engineering safety systems or the engineering of safety systems. A safety instrumented system (SIS) is a collection of hardware and software controls that are specifically designed for use on critical process systems. Our Services Whitepaper: Six Feet Under | How to Dig Yourself Out of a Recommendations Graveyard Have you felt buried under six feet of safety study recommendations that must be closed? Does it feel impossible to follow Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) to convert recommendations into engineered design reality? You are not alone. The PHA Recommendation Playbook | Part 3 | Managing Scheduling and Operational Disruptions Scheduling and operational disruptions are among the most common barriers to closing PHA recommendations. When safety improvements require outages or process changes, timing becomes the challenge. This article explores how facilities can plan ahead, manage risk, and turn scheduling constraints into long-term operational resilience. Understanding UL 508A Certified Control Panels | Enabling Safer, More Resilient Industrial Facilities UL 508A certified control panels give industrial facilities a clear path to safer, code-compliant operation. This article explains what the standard covers, how SCCR is established, what changed in 2025, and why working with a certified panel shop helps reduce risk, streamline inspections, and support long-term maintainability.

A Fail Closed device, typically a valve, is set to close automatically when a failure state occurs. A Fail Open device works in the opposite way and is set to open automatically when a failure state occurs. These failures are typically can be caused by a power or pressure loss. Acronyms & Terms Glossary <- More Definitions Fail Closed - Fail Open A Fail Closed device, typically a valve, is set to close automatically when a failure state occurs. A Fail Open device works in the opposite way and is set to open automatically when a failure state occurs. These failures are typically can be caused by a power or pressure loss. Our Services Whitepaper: Six Feet Under | How to Dig Yourself Out of a Recommendations Graveyard Have you felt buried under six feet of safety study recommendations that must be closed? Does it feel impossible to follow Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) to convert recommendations into engineered design reality? You are not alone. The PHA Recommendation Playbook | Part 3 | Managing Scheduling and Operational Disruptions Scheduling and operational disruptions are among the most common barriers to closing PHA recommendations. When safety improvements require outages or process changes, timing becomes the challenge. This article explores how facilities can plan ahead, manage risk, and turn scheduling constraints into long-term operational resilience. Understanding UL 508A Certified Control Panels | Enabling Safer, More Resilient Industrial Facilities UL 508A certified control panels give industrial facilities a clear path to safer, code-compliant operation. This article explains what the standard covers, how SCCR is established, what changed in 2025, and why working with a certified panel shop helps reduce risk, streamline inspections, and support long-term maintainability.

Screening, Risk Assessments, Training, State of Compliance, Screening Detailed Reports, Implementation, Machine Safety Guarding, Maintenance, Maintaining. plant managers, safety leaders/managers, and engineering managers from across a range of industries including packaging, food, chemical, auto, aerospace and robotics, American Standards, United States, Robots, Risk assessment, Robotics, this includes medical devices, pharma, food bev production Machinery Safety aeSolutions is proud to offer Machinery Safety Services to reduce the risk of injury in the manufacturing industry. For our clients who operate and maintain machinery, safety is a top priority. We help manufacturing facilities achieve safe machine operation through risk assessment, application of the hierarchy of control, and sensible safeguard design. In addition, our program helps reduce exposure to liabilities that can lead to unmanageable costs. Our comprehensive, scalable program addresses client’s specific needs and the machinery lifecycle to provide tailored solutions aligned with international and United States standards. Guard Against Injuries. Decrease Risk. Service Description The following services are offered: Screening to prioritize corrective actions Risk A ssessment to discover hazards, classify risk, and identify safeguarding objectives - Specializing in Robots & Packaging machinery Evaluation of facility compliance and the State of Conformity to address areas of improvement for installed safeguards, including performance level verification Safeguard Specification and implementation to make certain risk reduction is achieved, including selection and design, functional safety analysis, safety function requirements, and implementation Training on hazard identification, risk assessment execution, and standard interpretation Contact One of Our Experts Top Mistake to Avoid in Machinery Functional Safety In the machinery industry, a safety function is a control function that reduces the risk of injury, exposure to hazards, or harm to the... Machinery Safety – Is it a Safety Function? Determining this is not always straightforward and requires a hazard assessment to identify safety functions (e.g., equipment, devices, ... Ten Fingers and Ten Toes: Applying Machinery Safety Principles in a Process Plant When performing risk assessments on process equipment, are you reviewing machinery as well? Machinery Safety Standards – The What and Why The machinery safety standards positively recompense designers, integrators and users along with providing a framework for achieving OSHA co Robotic Systems Risk Assessments An effective RA starts with including knowledgeable employees with expertise in the operations, specific robotic application, RA methodology Analysis Robot Integration Risk Assessments Safety Function Performance Level Verification & Validation Machine Guarding Assessments Machine Safety Risk Assessments Design/Specification Design/Specification Safe Machinery Design Robotic Safety Light Curtain Positioning Guarding Design Interlock Design Circuit Design Qualitative Training Procedures Reduce Injuries Mitigate Risk Safeguard Hazards Protect Employees

Pharmaceutical Company Required Toxic & Combustible Gas Detection System A large-scale pharmaceutical manufacturing facility needed to develop and implement a gas detection system at their site to mitigate risk to personnel and equipment from a potential combustible or toxic gas leak. The project progressed from the assessment stages of developing a gas detection philosophy to ultimately integrating an industrially designed GDS 1400 MK II panel for the gas detection control and alarm system. Challenge This pharmaceutical facility had a large number of uncommon toxic and combustible gases and vapors. The gas detection philosophy document needed to account for the physical properties of the gases present at the site. The previously developed gas detection philosophy document did not account for the required gas detection alarm levels and sensor ranges. It also did not account for the limitations of the available detection technologies. Additionally, the document needed to describe how to address cross-sensitivity when multiple gases are present in the same area. Solution We developed a gas detection philosophy in compliance with the latest industry standards. The document addressed all of the following: • The physical characteristics of the gases and vapors at the facility • Industry-recognized exposure levels for the gases • Preferred gas detection technologies • Minimum requirements for gas detection including leak sizes • Addressed gas detection cross sensitivities aeSolutions designed and provided a comprehensive gas detection system to monitor all of the toxic and combustible gases and alert personnel to the hazards. Once established, the gas detection philosophy was used as the basis for integrating the GDS 1400 MK II gas detection control and alarm system. This unit utilizes the Siemens Simatic PCS7 series hardware/software platform and interfaces to the facility’s building management system and fire alarm panel. Its SIL 3-capable logic solver was scalable to a large I/O count, which ended up totaling 650 I/O counts distributed among seven (7) remote I/O panels for the large number of chemicals. The following were delivered: • Gas Detection Philosophy Document • Gas Detection Plot Plan and placement within the client 3D model • GDS 1400 MK II Gas Detection System • Specified and procured all of the gas detectors • Interface with building management system for HVAC control (e.g., overriding the HVAC control to dilute and/or remove explosive gases from the facility) • Interface with Fire Alarm panel for mass notification messaging • Interface with process control system for process shutdowns, where applicable Results The pharmaceutical company now has a scalable gas detection system capable of reducing the risk to personnel and equipment and complying with their corporate safety program requirements. The system also provides long term data collection of gases that have been measured in the facility. Learn more about how aeSolutions could help you with a similar project Industry: Pharmaceuticals Geography: Southeast Unit Operation: GDS 1400 MK II, Gas Detection System, PCS7, SPHA I/O, FGS Previous Story Next Story

PSM stands for Process Safety Management, a process that helps prevent/reduce risk of hazardous chemical releases. Acronyms & Terms Glossary <- More Definitions What does PSM stand for in safety PSM stands for Process Safety Management, a process that helps prevent/reduce risk of hazardous chemical releases. Our Services Whitepaper: Six Feet Under | How to Dig Yourself Out of a Recommendations Graveyard Have you felt buried under six feet of safety study recommendations that must be closed? Does it feel impossible to follow Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) to convert recommendations into engineered design reality? You are not alone. The PHA Recommendation Playbook | Part 3 | Managing Scheduling and Operational Disruptions Scheduling and operational disruptions are among the most common barriers to closing PHA recommendations. When safety improvements require outages or process changes, timing becomes the challenge. This article explores how facilities can plan ahead, manage risk, and turn scheduling constraints into long-term operational resilience. Understanding UL 508A Certified Control Panels | Enabling Safer, More Resilient Industrial Facilities UL 508A certified control panels give industrial facilities a clear path to safer, code-compliant operation. This article explains what the standard covers, how SCCR is established, what changed in 2025, and why working with a certified panel shop helps reduce risk, streamline inspections, and support long-term maintainability.

A process control loop is a system of sensors, controllers, and actuators that work together to maintain a process variable, such as temperature or pressure, at a desired setpoint. Control loops are fundamental to automated process control in industrial settings. Acronyms & Terms Glossary <- More Definitions Process Control Loop A process control loop is a system of sensors, controllers, and actuators that work together to maintain a process variable, such as temperature or pressure, at a desired setpoint. Control loops are fundamental to automated process control in industrial settings. Our Services Whitepaper: Six Feet Under | How to Dig Yourself Out of a Recommendations Graveyard Have you felt buried under six feet of safety study recommendations that must be closed? Does it feel impossible to follow Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) to convert recommendations into engineered design reality? You are not alone. The PHA Recommendation Playbook | Part 3 | Managing Scheduling and Operational Disruptions Scheduling and operational disruptions are among the most common barriers to closing PHA recommendations. When safety improvements require outages or process changes, timing becomes the challenge. This article explores how facilities can plan ahead, manage risk, and turn scheduling constraints into long-term operational resilience. Understanding UL 508A Certified Control Panels | Enabling Safer, More Resilient Industrial Facilities UL 508A certified control panels give industrial facilities a clear path to safer, code-compliant operation. This article explains what the standard covers, how SCCR is established, what changed in 2025, and why working with a certified panel shop helps reduce risk, streamline inspections, and support long-term maintainability.