Reliability Availability & Maintainability (RAM)

RAM Analysis concepts have been widely used by operators to develop optimised production solutions which minimise impact on revenue and expenditure. RAM techniques can be applied at engineering design and operational stage of an installation:


RAM simulations can be used to compare alterative design options by quantifying the likely production throughput for each option.

The analysis can be used to identify key systems which represent potential "bottlenecks" in production flow.

Historically, it has been shown that the findings of a RAM study conducted at an early stage will ultimately minimise the impact on project cost and schedule following a design change.

Front End Engineering Design

Reviews performed at FEED are often aimed at evaluating critical equipment which may lead to production losses. These reviews are also intended to provide a benchmark of predicted plant uptimes against targets.

This is particularly useful for large gas projects for which contractual agreements are based on gas deliverability. RAM reviews are able to provide solutions to identify an optimised plant configuration with the aim of avoiding costly penalties which may otherwise occur due to production downtime.

RAM studies can provide an invaluable insight into predicting production performance and it can ultimately provide input into

  • Equipment Selection
  • System Configuration
  • Maintenance and sparing philosophies
  • Power Load requirements
  • Pipeline Sizing
  • Third Party contractual agreements
Detailed Engineering

RAM assessments at this stage allow clients to establish minimum performance parameters for equipment items and packages that must be sourced by specialist vendors. The outcomes of the assessment can be directly used in defining the design specification required as part of the procurement process.


Adopting the principles of RAM and applying to a "live" facility can reap benefits for identifying unreliable equipment, plant bottlenecks and operational constraints. MES have supported operators in developing maintenance and sparing philosophies, diagnosing the root cause of failing equipment and de-bottlenecking systems with the objective of maximising plant performance.

MES is a leading provider of RAM services in Oil & Gas industry with experience in executing studies for Onshore, Offshore, Subsea and Floating facilities. Our extensive knowledge of reliability concepts and dedicated Monte Carlo simulation methods software ensures that we are well equipped to provide solutions in this area. Our specialist RAM consultants are able to provide:

  • Availability Studies
  • Markov State Modelling
  • Logistics and Transportation using "real time" simulation modelling
  • Debottlenecking and Performance Improvement studies
  • Spare Parts Optimisation
  • System Performance Evaluations
  • Whole Life Cycle Costing
  • CAPEX and OPEX Economic calculations
Reliability Availability & Maintainability (RAM)


  • Hazard Identification (HAZID) Workshop
  • Hazard and Operability (HAZOP) Workshop
  • Preliminary Hazard Analysis (PHA) Workshop
  • Offshore Activities Risk Assessment Review
  • BOWTIE Workshop
  • Failure Modes Effects and Criticality Analysis (FMECA) Workshop
  • Reliability Operability Maintenance (ROM) Workshop
  • Environmental Identification (ENVID) Workshop
  • Best Available Techniques (BAT) Workshop
  • Safety Integrity Level (SIL) Workshop
  • Layers of Protection Analysis (LOPA) Workshop
  • Fire and Explosion Hazards Analysis (FERA/FEA/FRA/FEDHA)
  • Gas Dispersion and Smoke Ingress (GDSI) Analysis
  • Exhaust Vent Study
  • Escape, Evacuation and Rescue Analysis (EERA)
  • Emergency Systems Survivability Assessment (ESSA)
  • Temporary Refuge Integrity Analysis (TRIA)
  • Non-Hydrocarbon Hazards Analysis (NHHA)
  • Dropped Object (DOS) and Material Handling Study
  • Ship/Helicopter Collision and Structural Failure Study
  • Transportation Risk Assessment (TRA)
  • Blast and Overpressure Analysis
  • Topsides/Riser/Subsea/Ship Safety Analysis
  • Fire, Heat and Smoke Detection System Design
  • Active Fire Protection (AFP) Design
  • Passive Fire Protection (PFP) Design
  • Fire and Gas Mapping
  • Fire Dynamics Analysis/Fire Effects Modelling
  • Quantitative Risk Assessment (QRA) for Onshore and offshore Facilities
  • Offshore/Onshore Pipeline QRA
  • Miscellaneous Risk Assessments (eg. Temporary Buildings, Transportation, etc.)
  • Simultaneous Operations (SIMOPS) Risk Assessment
  • Cost-Benefit Analysis (CBA)
  • ALARP Assessment
  • Offshore HSE/Safety Case Development
  • Onshore COMAH/CIMAH Report Development
  • HSE/Safety Case Updates/Revisions and Bridging Documents
  • HSE MS Audits and Reviews
  • Hazard and Risk Register Preparation
  • Emergency Response Plan (ERP) Development
  • Procedures for General Safety, Operations and Maintenance (SOP) Development
  • Performance Standards (PS) Development for Safety Critical Elements (SCES)
  • Safety Strategy and Philosophy Development
  • Onshore and offshore Facilities Surveys and Audits
  • Working Environment Risk Assessment (WERA)
  • Human Error and Human Factor Study
  • Job/Task Hazard Analysis (JHA)
  • Study of Human Behaviour during MAE
  • Ergonomics Study
  • Environmental Impact Assessment (EIA)
  • EIA Scoping
  • Availability Studies
  • Markov State Modelling
  • Logistics and Transportation Using "Real Time" Simulation Modelling
  • Debottlenecking and Performance Improvement Studies
  • Spare Parts Optimisation Studies
  • System Performance Evaluations
  • Whole Life Cycle Costing Evaluation
  • CAPEX and OPEX Economic Calculations
  • Risk Based Inspection Services
  • Reliability Centered Maintenance (RCM) Studies
  • Maintenance Optimisation Studies
  • Root Cause Analysis
  • Verification and Validation
  • Functional Safety Assessments
  • SIS Design
  • Safety Requirement Specification Development
  • Functional Safety Audits
  • Fundamentals of Functional Safety Training
  • Safety Integrity Level (SIL) Determination Training
  • Layer of Protection Analysis (LOPA) Training
  • Introduction to Reliability Concepts, Principles and Applications Training
  • Advanced RAM Analysis Training
  • Reliability Measurement and Improvement Training
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