Getty Images 625144818 Oil rig in sunset

Case Study

Maintenance optimisation review leads to significant savings

Prior to first hydrocarbon production, structured maintenance optimisation identifies opportunities to influence the overall maintenance workload - a net reduction in maintenance hours and costs that will pay dividends year-on-year.




High-pressure, high-temperature gas condensate offshore production facility.


A net reduction in maintenance time of 54% for the tasks studied. Net reduction of 6,600 hours per year with an associated reduction in OPEX equivalent to £670k recurring.

Client challenge

Prior to first hydrocarbon production, Vysus Group’s maintenance optimisation consultancy team were asked to conduct a review of the production facility’s maintenance programme (developed by a third party) to identify any opportunities to improve efficiency and reduce operating expenditure where possible.

The decision to invest in a maintenance optimisation review is one that can be taken at any point in an asset’s lifecycle, from the lead up operations, right through the operating phase and during any modifications or renewal programme. This case study plainly shows the benefits of taking those steps and the payback in doing so.

How we helped

Through a structured approach to reviewing maintenance tasks, task durations and task intervals significant benefits were identified through optimisation. The high-level equipment groups in this project mainly covered:

  • Electrical
  • HVAC
  • Instrument
  • Rotating equipment
  • Safety equipment

The scope of work was delivered by a small set of our highly experienced, multi-disciplinary reliability and maintenance consultants. At the core of the project was the gathering of equipment reliability data - sourced from the Client’s own operating history and published industry data. PM interval analysis, using software configured for the upstream offshore oil industry, considered the reliability requirements of systems and also accounting for the costs of enacting maintenance and the cost and risk of functional failure.

The same methodology and software are equally applicable in other high risk, capital intensive process industries – such as refining, petrochemical, renewables and manufacturing – enabling asset owners and operators to tailor their maintenance strategy and PM plans to suit their specific risk and commercial context.

Powerful results

The project identified changes totalling an annual reduction of 6,600 maintenance hours. This translated to a recurring, year-on-year 54% reduction in OPEX of £670k for the tasks studied.

Taking steps to review what plant maintenance is being done and the periodicity of those tasks is a valuable step – the results are usually a blend of opportunities to reduce risk in a balanced, justified manner by filling gaps, addressing over-maintenance and cutting non-value-adding work. The original basis of maintenance programmes can be the output of a rushed endeavour in the early days, with little in the way of strategy applied.

Had the project not been conducted, these time and cost savings would not have been realised; a reality that is all too common in many industries where preventative maintenance is a static, unchanging slice of the OPEX pie and the benefits of optimisation lie undiscovered.

6600Maintenance Hours

The project identified changes totalling an annual reduction of 6,600 maintenance hours. This translated to a recurring, year-on-year 54% reduction in OPEX of £670k for the tasks studied.

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