As assets reach the end of their operational life, margins tighten, systems age, and engineering decisions carry greater weight. Whether entering late-life operations or preparing for decommissioning, assets still require engineering assurance, but this phase is frequently approached with less structure and focus.
Late Life
Controlling Cost
As assets reach the end of their operational life, margins tighten, systems age, and engineering decisions carry greater weight.
OUR VALUE
Controlling Cost
At ICSS, we apply the same rigour here as we do at any other point in the lifecycle. We support clients in managing risk, controlling cost, and simplifying systems, without compromising operational integrity. Our focus is on practical, risk-aligned engineering that supports safe, efficient transitions.
We support late-life decisions with discipline, helping clients move forward with clarity and assurance.
Maintaining Integrity with Less
Risk doesn't disappear at end of life, it evolves. Our role is to ensure essential protections remain effective, even as resources and system supportability decline.
We reassess functional safety requirements to ensure systems remain compliant and operable with reduced staffing and degraded assets. We streamline test regimes, reduce scope, and simplify procedures, keeping risks within tolerable limits without overspending.
In cyber security, we develop proportionate strategies for legacy systems that may need to operate years into decommissioning. We reduce attack surface area, isolate critical components, and advise on pragmatic controls that minimise exposure without requiring full overhauls.
Structured Transitions
Executing changes on late-life assets requires care, clarity, and experience. Our engineers are trusted to lead critical modifications, support safe shutdowns, and manage technical risk across fragmented and often undocumented systems.
We define and execute modification scopes that are cost-effective, targeted, and safe. Our commissioning and C&I engineers oversee isolations, temporary system changes, and partial removals, ensuring nothing is missed and everything is verified.
Where assets need to operate through a protracted decommissioning phase, we develop lean commissioning and test strategies that allow systems to remain stable and serviceable while reducing operational overhead.
Simplicity Without Sacrifice
As systems wind down, we help our clients reduce automation and instrumentation to the essentials, maintaining only what's necessary for safe operation. We simplify architectures, rationalise logic, and reconfigure systems to reduce dependency and maintenance burden.
Our lifecycle insight and system knowledge support confident rationalisation, ensuring functionality is retained where required and retired where appropriate.
We help unlock the full potential for efficiency and cost savings by simplifying systems and removing unnecessary complexity.
The ICSS Difference
End-of-life operations require clear priorities, structured processes, and experienced leadership. ICSS helps clients navigate this phase with confidence, ensuring technical integrity is maintained while costs are controlled.
We understand legacy systems. We understand operational constraints. And we work closely with our clients to ensure shutdown and decommissioning activities are delivered safely, efficiently, and with full visibility.
We bring clarity to late-stage decisions, ensuring the final phase is not just safe, but cost-effective and strategically aligned.
OUR APPROACH
01
Risk Assessment
We lead structured risk assessments to support safe and efficient decommissioning from Cessation of Production (CoP) through to final removal. This includes reviewing safety and environmental critical elements and key systems to determine which should be retained, modified, or retired at each phase.
Our process ensures that risk is managed dynamically, resources are focused where needed, and systems are retired in a controlled, phased manner, enabling a safe and efficient transition through decommissioning.
02
Vulnerability Assessment
We conduct an assessment of automation system health and operability across PCS, ESD, F&G, PMS, and other third-party systems. This includes evaluating integrity, obsolescence, supportability, and resilience during late-life operations through to final removal.
Findings are used to maintain safe operations, reduce risk exposure, and plan for potential failure scenarios, providing a technically sound basis for staged withdrawal or continued use under revised conditions.
03
Impact Assessment
We perform a structured assessment of Safety Instrumented Systems (SIS) to understand the impact of decommissioning on Safety Instrumented Functions (SIFs). This includes identifying functions that can be retired or downgraded as risk profiles change, and systems are phased out.
We ensure that safety integrity is maintained where needed, while eliminating unnecessary maintenance and proof testing. By aligning safety functions with late-life operational needs, we help reduce cost, simplify operations, and support a safe, compliant transition through decommissioning.
04
F&G Declassification
We reassess Fire & Gas (F&G) detection and protection requirements for each zone based on the updated risk profile during late-life operations and decommissioning. This includes reviewing F&G coverage, as well as evaluating the need for active protection systems such as deluge and foam systems.
Using a risk-based approach, we identify where F&G systems can be scaled down or retired without compromising safety or compliance. This ensures remaining hazards are still appropriately managed while reducing ongoing maintenance costs.
05
Rationalisation Strategy
We develop a structured strategy to phase out, simplify, or consolidate automation systems in alignment with the asset's decommissioning timeline. This includes system management, spares planning, and focused maintenance to sustain only what's essential.
By aligning rationalisation with risk and operational need, we reduce cost and complexity without compromising safety. Our approach ensures critical systems remain supported, cyber security risks are mitigated, and regulatory compliance is maintained throughout late-life operations.
06
Retirement Plan
We review the Maintenance Management System (MMS) to identify activities that can be optimised, reduced, or retired in line with decommissioning milestones. This includes mapping maintenance reductions to asset phase-down timelines and system requirements.
We provide a clear pathway to reduce cost while maintaining safety and compliance. Our approach supports better planning, resource allocation, and contract efficiency, ensuring critical systems remain supported only as long as necessary.
07
Execution
Following Cessation of Production (CoP), we deliver the rationalisation strategy on site, executing system isolations, completing required commissioning activities, and coordinating the phased removal or deactivation of systems in line with decommissioning plans.
We bring delivery assurance to the most critical phase, ensuring safe, controlled execution with minimal disruption. Our structured approach keeps work aligned with risk reduction goals, project milestones, and regulatory expectations.
08
Regulator Engagement
We engage directly with regulators on behalf of the client throughout late-life operations and decommissioning, ensuring that automation modifications, including ESD and F&G reductions, are aligned with safety and compliance expectations.
Early, proactive engagement avoids surprises. We streamline approvals, clarify documentation needs, and ensure regulator confidence, enabling a smooth, compliant transition through every phase of the end-of-life journey.
Start Here