IB Business Management HLTopic 2 — Introduction to Human Resource ManagementPaper 1, 2 & 3Core idea | Calculations~11 min read
Planning the Workforce a Business Needs
A business can have a brilliant product and still fall apart if it has the wrong people, too few of them, or the right people in the wrong jobs. Workforce planning is simply the business asking: how many staff will we need, with what skills, and when? This page shows you how that question gets answered, and how examiners test it with four short calculations.
📘 What you need to know
Human resource planning (or workforce planning) works out how many employees a business needs, what skills they need, and when they are needed.
Employees are both an asset (skills, ideas, service, reputation) and a cost (pay, training, benefits, redundancy).
You must be able to calculate and comment on four measures: labour productivity, labour turnover, labour retention and absenteeism.
Internal factors come from inside the business: its objectives, its finances, its structure, its culture and its relations with unions.
External factors come from outside and cannot be controlled: the economy, the labour market, technology, the law, society and politics.
A number on its own means nothing. Marks come from saying what caused it and what the business should do about it.
What workforce planning really means
Think about a coffee chain that wants to open twelve new branches next year. Someone has to work out that each branch needs about eight staff, that four of those need barista training, that hiring takes six weeks, and that training takes three. If nobody does that maths, the shops open with the doors unlocked and nobody behind the counter.
That is all workforce planning is. It looks at how employees will be recruited, trained, deployed (moved to where they are needed) and led, and it does it in advance rather than in a panic.
Notice that step 4 has four possible answers, not one. Cutting staff is a workforce plan too.
Students often write that HR planning is “hiring people”. It is not. Redeploying an existing worker or retraining a team is usually cheaper and faster than recruiting, and examiners like to see you say so.
Staff are an asset and a cost at the same time
This is the tension that sits under almost every HR exam question. The same person shows up twice in the business: once as something valuable, once as money going out.
For many service businesses, staffing is the single largest cost they have. It is also the thing customers actually experience.
🤔 Why this matters for evaluation marks
When a question asks whether a business should cut staff to save money, the asset side is your counter-argument. Yes, wages fall straight away. But service gets slower, experienced people take their knowledge to a rival, and remaining staff worry about their own jobs, so productivity often falls too. Two sides, one employee — that is a balanced answer.
The four numbers you have to be able to work out
These four appear again and again in Paper 1 and Paper 2. They are all short. The marks are in the interpretation, so learn the formulas until they are automatic and save your thinking for the comment afterwards.
Labour productivity
Labour productivity
labour productivity = total output ÷ number of employees
This is output per worker over a set period. Higher productivity means each worker produces more, so the labour cost buried in every unit falls. That is why productivity and competitiveness get mentioned in the same breath.
WORKED EXAMPLE
A factory made 48 000 units last month with 30 workers. After new training, output rose to 54 600 units with the same 30 workers. Calculate labour productivity before and after, and the percentage change.
Before the training48 000 ÷ 30 = 1 600 units per workerAfter the training54 600 ÷ 30 = 1 820 units per workerPercentage change(1 820 − 1 600) ÷ 1 600 × 100 = 13.75%Productivity rose by 13.75%Say why it matters: same wage bill, more units, so the labour cost per unit falls.
Labour turnover
Labour turnover
labour turnover (%) = (number of staff leaving ÷ average number employed) × 100
Turnover measures how many people walk out of the door in a year. A little turnover is healthy — fresh ideas come in. A lot is expensive, because every leaver has to be replaced, recruited and trained, and the business loses whatever they knew.
WORKED EXAMPLE
A café chain employed an average of 250 staff last year. 65 of them left. Calculate the labour turnover rate and suggest two reasons why it might be this high.
Put the numbers in(65 ÷ 250) × 100 = 26%Labour turnover = 26%Now comment (this is where the marks are)Possible causes: low pay compared with rivals, unsocial hours, little chance of promotion, or poor management. Cost to the business: constant recruitment and training spending, plus weaker service while new staff learn.
Labour retention
Labour retention
labour retention (%) = (number who stayed all period ÷ average number employed) × 100
Retention is turnover looked at from the other end: the share of people who stayed. If turnover is 26%, retention is roughly 74%. High retention usually points to decent pay, good management and staff who feel valued — though it can also mean nobody has anywhere better to go.
Absenteeism
Absenteeism
absenteeism (%) = (staff days absent ÷ total possible staff days) × 100
WORKED EXAMPLE
A warehouse has 40 staff and 21 working days in a month. Across the month there were 42 days of absence. Calculate the absenteeism rate.
Step 1: find the total possible staff days40 staff × 21 days = 840 possible daysStep 2: divide and turn into a percentage(42 ÷ 840) × 100 = 5%Absenteeism = 5%Watch the denominator. It is staff days, not staff. Getting 42 ÷ 40 is the classic error.
Read the numbers together. Rising absenteeism plus rising turnover plus falling productivity is not three problems. It is usually one problem — motivation — showing up in three places.
What pushes the plan from inside the business
Internal factors are the ones the business has some control over. They change the plan because they change what the business is trying to do.
Internal factor
How it changes the workforce plan
Objectives and strategy
Growing into a new country needs more staff, and staff who speak the language. Moving online needs fewer shop assistants and more developers.
Financial position
A tight budget limits pay offers, training and headcount. Businesses short of cash often freeze hiring first because it is the quickest saving.
Organisational structure
Removing a layer of managers, or merging two departments, instantly changes how many people are needed and where.
Labour relations
Where unions are strong, changes to hours, pay or job cuts have to be negotiated, which slows the plan down and often makes it more expensive.
Culture
A business known for treating people well attracts applicants and keeps them. A toxic culture pushes staff out and quietly raises the recruitment bill.
What pushes the plan from outside
External factors are outside the firm’s control. The business cannot change them, so it has to react to them.
The plan sits in the middle and gets pulled both ways. If an exam case gives you a recession or a new law, that is the outside column asking to be used.
The external ones in plain English
The economy. When growth is strong, businesses fight to attract and keep staff. In a downturn they freeze hiring or make redundancies.
The labour market. If there is a shortage of nurses, plumbers or coders in your area, you will have to pay more or train your own.
Technology. Automation and AI remove some jobs and create others, so plans have to include re-skilling and up-skilling existing staff.
Laws and regulations. Employment law, health and safety, minimum wage and immigration rules all set limits on what the plan can do.
Society. Expectations around flexible working, diversity and wellbeing have shifted, and businesses that ignore that struggle to recruit.
Politics. Tax changes, trade deals and visa rules change how easy it is to hire from abroad.
Competitors. If a rival opens nearby and offers more, your retention problem arrives whether you planned for it or not.
A good habit for Paper 2: underline anything in the stimulus about the economy, the local area, or new technology. Those sentences are put there on purpose, and they are usually worth an application mark.
💡 Exam tip
Always show the formula, then the substitution, then the answer. Method marks are still available even if you slip on the arithmetic.
Add the unit or the percentage sign. “1 820” is not the same answer as “1 820 units per worker”.
Never stop at the number. A calculation question that says “comment” or “analyse” wants a cause and a consequence.
Use the case study’s own words. If the stimulus mentions unsocial hours, use that as your reason for high turnover rather than a generic one.
Remember that high retention is not automatically good. It can mean no new ideas coming in, and staff staying only because there are no other jobs nearby.
Match the factor to the question. If it asks for external factors, do not spend half your answer on the firm’s own budget.
⚠ Common mix-ups
Turnover of staff is not sales turnover. Same word, completely different thing. Say “labour turnover” so there is no doubt.
Productivity is not production. Production is total output. Productivity is output per worker. A business can raise production by hiring more people while productivity falls.
Absenteeism uses staff days, not staff. Multiply the number of employees by the number of working days first.
Retention and turnover are opposites, not the same thing. If you are asked for one, do not calculate the other.
Internal and external get swapped. Organisational culture is internal. The labour market is external. A recession is external even though it hits the firm’s finances.
Treating staff only as a cost. Answers that argue for redundancies without mentioning lost skills and lower morale cap themselves at low marks.
Up next: How Working Patterns Are Shifting — why the nine to five stopped being the default, and what that means for the people writing the workforce plan.
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