Assurance & integrity
Integrity problems compound.
An asset allowed to decline below active management becomes expensive to bring back, and the window in which that cost is recoverable narrows faster than most operators expect. Our assurance work is structured around one principle: the problems that cost most are the ones that were visible earlier and not acted on. We give you the independent sounding board needed for rapid, confident decisions on safety-critical issues, before they become urgent.
A
SECEs
Safety and environmental critical elements reviewed, performance standards tested
ALARP
MAH gaps identified, ALARP demonstration confirmed
Verification
Independent verification findings reviewed, evidence strengthened, actions closed properly
A services
Assurance
services.
services.
Independence is the value. Our practitioners aren't fee-extending the engagement, they're trying to give you the same answer the regulator will arrive at, before it costs you enforcement action or unplanned shutdowns.
Independent verification & regulatory inspection support
Structured independent assessment of your asset mirroring NSTA, OPRED and HSE evaluation, before they do. We identify issues, prepare your team and ensure you present the strongest possible case. Live safety case support and performance standard review included.
COO / Ops Director
readiness confirmed
C, enforcement avoided
Process safety reviews & HAZOP
Independent process safety assessments and facilitated HAZOP studies by experienced industry professionals. Safety cases reviewed against regulatory expectations, MAH gaps identified and ALARP demonstration confirmed. Independent facilitation removes internal bias.
Asset Manager
A, compliance confirmed
P, MAH risk reduces shutdowns
C, enforcement costs avoided
Operational risk review & ORA assessment
Review of in-place operational risk assessments (ORAs), identifying and prioritising non-conformances, impaired SECEs and accumulated risk. We assess risks individually and cumulatively, providing a clear picture of total exposure that supports confident operational decisions.
Asset Manager
A, cumulative risk visible
P, SECE impairment quantified
Asset integrity management programme
Development or peer review of your asset integrity management system, corrosion, risk-based inspection, pressure system compliance and life extension justification. Back-to-basics approach verifying all risks are owned, monitored and that maintenance strategies reflect current operating conditions.
Technical Lead
A, integrity managed
P, unplanned shutdowns ↓
C, inspection prioritised
E, containment events prevented
Functional safety & SIL verification (SIS / SIL)
Assessment and verification of safety instrumented systems (SIS) against IEC 61511 / IEC 61508. SIL determination, SIL verification, LOPA studies and functional safety audit. We also quantify the production impact of spurious trip rates and provide options for improvement on ageing control systems.
Technical Lead
A, SIS compliance
P, spurious trips ↓
C, overdesign challenged
A
Risk-ranked, evidence-led
Catch the visible risks now. Find the ones nobody is looking at.
Independent eyes, brought into your asset by Sigma4, see what familiar eyes have stopped seeing. We turn that into a risk-ranked register, with each item owned, monitored and closed out, so MAH gaps don’t sit dormant until the next inspection finds them.
The complete PACE picture
Production gains that compromise integrity aren't gains. Explore the other pillars:
Start with production
Where is your asset
leaking value?
leaking value?
Tell us about the production losses you've been living with. We'll often start with a complimentary PACE review or a fixed-scope APD to quantify the prize before any longer engagement is discussed.