5.4 Knowledge Tests & Management Systems (HSG65 / ISO 45001)

5.4 Knowledge Tests & Management Systems (HSG65 / ISO 45001)

Quick Answer: Courts and competent investigators often ask what a reasonable employer/manager should have known. Managing Safely groups that idea into three knowledge tests: common, industry, and expert. Structured management systems — HSG65 (HSE managing for health and safety) and ISO 45001 — use Plan–Do–Check–Act (PDCA) so duties are not left to chance.

Understanding responsibilities is not only about statutes and notices. It is about whether your organisation’s system would have foreseen and controlled the risk with the knowledge that could reasonably be expected. This section joins legal reasonableness to practical management-system design.

Why "what should you have known?" matters

After harm occurs, hindsight is easy. The fair legal and professional question is different: given your role, sector, and access to information, what ought you to have known and done before the event?

That question links to:

• Civil negligence (standard of the reasonable person/employer)
• Criminal evaluations of whether risks were controlled so far as reasonably practicable
• Internal learning (was this a pure freak event or a predictable system failure?)

Managing Safely gives you a simple three-level model to discuss expected knowledge without turning you into a barrister.

The three knowledge tests

1. Common knowledge

Common knowledge is what any reasonable person would be expected to know — not specialist training required.

Examples:

• Wet floors can cause slips
• Knives and unguarded blades cut
• Vehicles can strike pedestrians
• Electricity can shock
• Smoke and fire kill
• Overloaded shelves can collapse

If a manager ignores an obvious trailing cable in a corridor, "I am not a safety professional" is a weak answer. Common knowledge already flags the hazard.

2. Industry knowledge

Industry knowledge is what a reasonable person in that sector or type of work should know — trade practice, sector guidance, normal controls for that industry.

Examples:

• Construction managers knowing basic work-at-height expectations and temporary works awareness
• Warehouse managers knowing workplace transport segregation good practice
• Kitchen managers knowing hot oil, knife, and slip controls typical in catering
• Engineering workshops knowing guarding and isolation norms for machine tools
• Care or clinical settings knowing infection and manual-handling norms for that environment

You are not expected to invent nuclear physics on a building site; you are expected to know mainstream controls for your industry’s routine risks.

3. Expert knowledge

Expert knowledge is specialist knowledge beyond normal industry competence — often requiring a competent person, consultant, or technical expert.

Examples:

• Detailed asbestos survey interpretation and removal methods
• Complex process safety / COMAH-type assessments
• Specialist occupational hygiene monitoring strategies
• Structural engineer calculations for temporary works of significant complexity
• In-depth noise or vibration engineering redesign

The manager’s duty is often to recognise the need for expert input and to act on competent advice — not to pretend to be the expert.

Knowledge tests summary table

Worked examples

Exam use of the knowledge tests

Questions may ask which test applies, or whether a manager should have known about a risk. Pattern:

• Obvious physical danger → common
• Sector-typical control missing → industry
• Highly technical hazard → expert (manager should seek competence)

Failing a common or industry knowledge expectation is hard to defend. Failing to seek expert help when a hazard is clearly specialised is also a management failure.

Management systems — turning duties into routine

Knowledge without a system is fragile: it lives in one person’s head until holiday, resignation, or production pressure. A health and safety management system makes good practice repeatable: policy, planning, implementation, checking, and learning.

Managing Safely introduces two reference points at overview level:

1. HSG65 — HSE’s managing for health and safety approach
2. ISO 45001 — international occupational health and safety management system standard

You do not need to implement full certification project detail for the exam. You do need PDCA literacy and manager actions under each stage.

HSG65 and Plan–Do–Check–Act

HSE’s HSG65 guidance promotes a Plan–Do–Check–Act model for managing health and safety. It replaced older "POPMAR" teaching in HSE’s core messaging and aligns how organisations lead, process, and improve safety performance.

PDCA in plain language

PDCA is a loop, not a one-off project. After Act, you re-enter Plan with better information.

ISO 45001 at overview level

ISO 45001 is the international standard for occupational health and safety (OH&S) management systems. Organisations may seek certification, or simply use the framework as good practice.

At Managing Safely depth, remember:

• It is PDCA-aligned
• It emphasises leadership and worker participation
• It requires understanding context, risks and opportunities, legal requirements, and continual improvement
• It integrates with other ISO management system standards in structure (useful for larger organisations)

You will not be examined as an ISO lead auditor. You may be asked to recognise ISO 45001 as an OH&S management system standard and to map its spirit to PDCA manager actions.

HSG65 and ISO 45001 — how to talk about both

Manager actions mapped to Plan / Do / Check / Act

Use this table for both exam answers and real leadership.

Mini case — applying PDCA

A packaging line sees rising minor cuts.

• Plan: Analyse tasks; target cut reduction; plan knife substitution and glove standard; schedule training.
• Do: Introduce safer cutters; remove unsuitable blades; train and supervise.
• Check: Inspect tool use weekly; track cut incidents and near misses; ask workers what still fails.
• Act: Replace a tool type that still snags; redesign packing station; update the assessment and briefing pack.

That is management-system thinking at team level — exactly what Managing Safely wants from managers who are not full-time safety professionals.

Connecting knowledge tests to PDCA

A system that only reacts after expert consultants visit will still fail common and industry tests. A system that never calls experts will fail when hazards exceed local competence.

Leadership, culture, and documentation (keep proportionate)

Management systems fail when:

• Policy exists but supervisors are not resourced to implement
• Check stages are paperwork-only and never observe real work
• Act stages punish reporters instead of fixing causes
• Documents are copied from another site and do not match reality

Proportionate documentation supports memory and consistency; it is not a substitute for control. That message matches HSE’s emphasis on managing risk in practice.

Chapter synthesis — Understanding Responsibilities

Pull the module together:

1. Criminal vs civil — punishment/deterrence vs compensation; both can follow one incident.
2. Employer & employee duties — HSWA-style pillars; cooperate and no misuse; written policy at 5+.
3. Enforcement — enter/investigate; improvement (fix by date) vs prohibition (stop serious injury risk); prosecution escalates.
4. Knowledge & systems — common/industry/expert tests; HSG65 and ISO 45001 via PDCA.

A competent manager uses legal literacy to prioritise, a duty framework to organise work, enforcement awareness to respond correctly under pressure, and a PDCA system so improvement does not depend on luck.

Exam checklist for this section

• Name the three knowledge tests and give one example each
• Define HSG65 as HSE’s managing-for-health-and-safety PDCA approach
• Recognise ISO 45001 as the international OH&S management system standard
• Map at least one manager action to each of Plan, Do, Check, Act
• Link "should have known" failures to weak planning or checking in the system

Master this and you can explain not only what the law demands but how a reasonable organisation builds a system that meets those demands day after day.