Measurement and Metrics
API RP 754 Tier 1 to 4 process safety event indicators, both lagging and leading, made visible to leadership
What this element is and why it matters
Measurement and Metrics is the indicator system that lets leadership see the operating state of process safety before it shows up as a catastrophic event. The element maps to API RP 754, covering Tier 1 to 4 process safety event indicators, and to CCPS RBPS Element 18. Tier 1 captures the worst events, which are losses of primary containment with consequence, Tier 2 captures the lesser losses of containment, Tier 3 captures challenges to the safety system, and Tier 4 captures operating discipline failures, and our team builds the full set so nothing important goes unseen.
Individual significance for organisations
Without leading indicators, leadership only sees what has already failed, whereas with them the trajectory becomes visible early enough to act. Organisations that achieve mature process safety event measurement integrate it into board governance, capital allocation, and ESG disclosure. The element is also a critical signal to insurers, regulators, and investors.
Contribution to Risk Based Process Safety (RBPS)
Measurement and Metrics is how pillar four quantifies organisational learning. It receives data from Incident Investigation (Element 17), drives the priority for Auditing (Element 19), and feeds Management Review (Element 20). Element 18 also closes back to pillar one by giving leadership the data they need to sustain investment in the culture of Element 1.
What compliant execution looks like
How we implement this element
A focused six step methodology calibrated to deliver measurement and metrics as a working capability rather than a documented compliance artefact.
We adopt API RP 754 as the primary framework, supplement it with IOGP, ICCA, and CCPS metrics, and align it with your corporate HSE indicator definitions.
We define each indicator with its calculation method, data source, frequency, and threshold, and align them with your site equipment register and procedural inventory.
We specify the data collection workflow across operator reporting, supervisor verification, monthly compilation, and third party validation where it is required.
We follow Stephen Few principles with a bullet chart per indicator, a traffic light status, and a trend with annotation, and set a monthly, quarterly, and annual review cadence.
We aggregate corporate wide, benchmark against the RCMI, OGUK, and API peer surveys, and integrate the result with ESG, TCFD, and CSRD reporting.
We run a quarterly indicator review that targets corrective action, refine the indicators as the programme matures, and align it with your corporate HSE strategy.
Element implementation flow chart
A decision gated workflow that shows the actual sequence of activities from initiation through steady state operation, with key decision points highlighted.
What we produce
- An API RP 754 indicator library and calculation guide
- A data collection workflow and responsibility matrix
- A site KPI dashboard with a monthly review pack
- A corporate aggregation and benchmarking protocol
- ESG, TCFD, and CSRD reporting integration
- An annual indicator effectiveness review
Where execution fails
- Lagging only measurement with no leading indicators
- Indicator data that is never verified, so leadership decisions rest on bad data
- Threshold breaches that fail to trigger corrective action
- Corporate aggregation that hides deterioration at the site level
Codes this element is built on
Explore related elements in this framework
Risk Based Process Safety (RBPS) full element index
Talk to us about implementing Measurement and Metrics
We can scope this element implementation against your facility, regulatory context, and existing management system maturity, then integrate it with the other Risk Based Process Safety (RBPS) elements you already operate.