CESCO study materials
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CESCO key terms

CESCO · Get comfortable with the vocabulary.

Safety Management System (SMS)

A structured set of policies, objectives, responsibilities, and procedures an organization uses to manage safety as an integrated business function rather than a collection of disconnected activities.

Related: Safety Policy, Management of Change, Leading Indicator
Safety Policy

A written top-level statement, signed by senior leadership, that commits the organization to protect workers and defines the principles and authority behind the safety program.

Related: Safety Management System (SMS), Accountability, Safety Culture
Accountability

The obligation of a named person to answer for safety results and decisions within their assigned scope, backed by defined authority and consequences.

Related: Responsibility, Safety Policy, Key Performance Indicator
Responsibility

The assigned duty to carry out a specific safety task or function, such as inspections or training, which may be delegated even when accountability is not.

Related: Accountability, Competency
Leading Indicator

A proactive measure of preventive activity, such as inspections completed or near misses reported, that signals future safety performance before losses occur.

Related: Lagging Indicator, Key Performance Indicator, Near Miss
Lagging Indicator

A retrospective measure of outcomes that have already happened, such as recordable injury rates or lost workdays, used to confirm trends rather than predict them.

Related: Leading Indicator, Recordable Injury, Lost Time Injury
Key Performance Indicator (KPI)

A specific, measurable metric tied to a safety objective, with a target and a review cycle, used to judge whether the program is delivering intended results.

Related: Leading Indicator, Lagging Indicator, Safety Objective
Safety Objective

A time-bound, measurable target the organization sets for reducing risk or improving safety performance, forming the basis for planning and performance review.

Related: Key Performance Indicator, Safety Policy
Safety Culture

The shared values, beliefs, and behaviors that determine how seriously safety is treated in daily decisions, especially when production pressure competes with protective measures.

Related: Safety Climate, Just Culture, Safety Policy
Safety Climate

The measurable, current perception employees hold about safety priorities, communication, and management commitment at a given point in time, often captured through surveys.

Related: Safety Culture, Leading Indicator
Just Culture

A framework that distinguishes human error from at-risk behavior and reckless conduct, so that reporting is encouraged while genuine disregard for risk is still addressed.

Related: Safety Culture, Near Miss, Human Error
Competency

The combination of knowledge, skills, and demonstrated ability a person needs to perform an assigned safety-critical task correctly and without close supervision.

Related: Training Needs Analysis, Responsibility
Management of Change (MOC)

A formal process for reviewing and approving changes to equipment, processes, materials, or staffing before implementation, to control any new or increased risk.

Related: Pre-Startup Safety Review, Hazard, Risk Assessment
Pre-Startup Safety Review (PSSR)

A structured verification, performed before a new or modified facility is placed into service, that construction matches design and that safety systems are functional.

Related: Management of Change (MOC), Permit to Work
Contractor Safety Management

The process of qualifying, briefing, supervising, and evaluating outside firms so their workers meet the same safety expectations as employees while on site.

Related: Competency, Permit to Work, Safety Policy
Hazard

A source, situation, or condition with the potential to cause harm to people, property, or the environment, independent of how likely that harm is.

Related: Risk, Hazard Identification, Exposure
Risk

The combination of how likely a hazardous event is and how severe its consequences would be, used to rank hazards and decide which controls are needed.

Related: Hazard, Risk Assessment, Risk Matrix
Hazard Identification

The systematic process of finding and recording hazards before they cause harm, using methods such as walkthroughs, task analysis, and incident history review.

Related: Hazard, Job Safety Analysis, Risk Assessment
Risk Assessment

The structured evaluation of identified hazards to estimate likelihood and severity, judge acceptability against criteria, and determine what controls are required.

Related: Risk, Hierarchy of Controls, Residual Risk
Risk Matrix

A grid that plots likelihood against consequence severity to assign a risk rating, giving a consistent basis for prioritizing hazards and setting control urgency.

Related: Risk, Risk Assessment, Risk Tolerance
Hierarchy of Controls

A ranked order of risk-reduction measures, from elimination and substitution through engineering controls, administrative controls, and finally personal protective equipment.

Related: Engineering Control, Administrative Control, Personal Protective Equipment
Engineering Control

A physical change to equipment, processes, or the workplace, such as guarding, ventilation, or interlocks, that reduces risk without relying on worker behavior.

Related: Hierarchy of Controls, Administrative Control, Lockout/Tagout
Administrative Control

A procedural or organizational measure, such as training, rotation, signage, or work permits, that reduces exposure but depends on consistent human compliance.

Related: Hierarchy of Controls, Engineering Control, Permit to Work
Personal Protective Equipment (PPE)

Worn or held equipment, such as helmets, gloves, or respirators, that shields the user from a hazard but does not remove the hazard at its source.

Related: Hierarchy of Controls, Exposure
Residual Risk

The risk that remains after existing or planned controls have been applied, which must be compared against the organization's acceptance criteria.

Related: Risk Assessment, Risk Tolerance, Hierarchy of Controls
Risk Tolerance

The level of residual risk an organization is willing to accept for a given activity, stated in criteria that guide whether work may proceed as planned.

Related: Residual Risk, Risk Matrix, ALARP
ALARP

A principle requiring risk to be reduced as far as reasonably practicable, weighing the sacrifice involved in further controls against the safety benefit they would deliver.

Related: Risk Tolerance, Residual Risk
Job Safety Analysis (JSA)

A method that breaks a task into sequential steps, identifies hazards at each step, and specifies controls before the work is performed.

Related: Hazard Identification, Permit to Work, Hierarchy of Controls
Exposure

The extent to which a person comes into contact with a hazard, described by duration, frequency, concentration, or proximity, and central to estimating likelihood of harm.

Related: Hazard, Personal Protective Equipment, Risk
Permit to Work

A documented authorization for high-risk tasks that confirms hazards were assessed, controls are in place, and the work area is safe to enter before activity begins.

Related: Job Safety Analysis, Lockout/Tagout, Management of Change (MOC)
Lockout/Tagout (LOTO)

A procedure for isolating and securing energy sources so equipment cannot be started or release stored energy while someone is servicing or maintaining it.

Related: Engineering Control, Permit to Work, Hazard
Regulation

A binding legal requirement issued by a government authority that sets mandatory safety obligations, often with defined duties, records, and enforcement consequences.

Related: Standard, Regulatory Compliance, Competent Authority
Standard

A document established by consensus or an authoritative body that specifies technical requirements or good practice, which may be mandatory when incorporated into regulation or contract.

Related: Regulation, Regulatory Compliance, Hierarchy of Controls
Regulatory Compliance

The state of meeting all applicable legal safety requirements, demonstrated through documented programs, records, inspections, and timely correction of identified deficiencies.

Related: Regulation, Audit, Corrective Action
Competent Authority

The government body empowered by law to enforce safety regulations in a jurisdiction, including the power to inspect, cite, fine, or shut down operations.

Related: Regulation, Regulatory Compliance
Duty of Care

The legal and ethical obligation of an employer to take reasonable steps to protect workers and others affected by its operations from foreseeable harm.

Related: Regulation, Risk Assessment, ALARP
Audit

A systematic, documented examination of safety programs and records against defined criteria, performed to verify conformity and identify improvement opportunities.

Related: Inspection, Regulatory Compliance, Corrective Action
Inspection

A routine, often physical check of the workplace, equipment, or practices to confirm conditions meet requirements and to detect deterioration before it causes harm.

Related: Audit, Hazard Identification, Leading Indicator
Incident

An unplanned event or sequence of events that caused or could have caused harm, damage, or disruption, including events with no actual injury or loss.

Related: Near Miss, Incident Investigation, Root Cause Analysis
Near Miss

An unplanned event that did not result in injury or damage but had the potential to do so, providing free evidence of a control failure worth investigating.

Related: Incident, Incident Investigation, Just Culture
Incident Investigation

A structured inquiry into what happened, why it happened, and what must change to prevent recurrence, focused on system failures rather than assigning blame.

Related: Root Cause Analysis, Corrective Action, Incident
Root Cause Analysis (RCA)

A technique, such as the five whys or a fishbone diagram, used to trace an incident back to underlying management-system weaknesses rather than stopping at immediate causes.

Related: Incident Investigation, Corrective Action, Human Error
Human Error

An unintended action or omission by a person that deviates from intended behavior, usually shaped by workplace conditions such as workload, design, and training.

Related: Just Culture, Root Cause Analysis, Competency
Corrective Action

A change made to eliminate the cause of a detected nonconformity or incident so it does not recur, tracked to completion and verified for effectiveness.

Related: Root Cause Analysis, Preventive Action, Audit
Preventive Action

A proactive change taken to eliminate the cause of a potential nonconformity before it occurs, based on trend analysis, near misses, or risk review.

Related: Corrective Action, Leading Indicator, Near Miss
Emergency Response Plan

A documented set of procedures, roles, resources, and communication arrangements that defines how an organization will respond to and recover from emergencies.

Related: Drill, Evacuation, Incident
Drill

A planned rehearsal of an emergency response or evacuation that tests procedures, roles, and equipment under realistic conditions and exposes gaps to be corrected.

Related: Emergency Response Plan, Evacuation, Corrective Action
Evacuation

The organized movement of people away from a dangerous area to a safe location, following defined routes, alarms, and assembly arrangements.

Related: Emergency Response Plan, Drill, Assembly Point
Assembly Point

A pre-designated safe location where people gather after evacuation so that roll call can confirm everyone is accounted for.

Related: Evacuation, Emergency Response Plan, Drill
Recordable Injury

A work-related injury or illness meeting defined severity or treatment criteria that must be entered in the employer's injury log and reported as required.

Related: Lost Time Injury, Lagging Indicator, Incident
Lost Time Injury

A work-related injury that causes an employee to miss at least one scheduled workday or shift beyond the day of the incident.

Related: Recordable Injury, Lagging Indicator
Business Continuity Plan

Arrangements for keeping or restoring critical operations after a disruption, covering alternate sites, key suppliers, and prioritized recovery of essential functions.

Related: Emergency Response Plan, Incident