IB Business Management SLTopic 2 — Introduction to Human Resource ManagementPaper 1 & 2Core skill~10 min read
Planning the Workforce a Business Needs
Every business has to answer two awkward questions: how many people do we need, and what kind? Get it wrong in one direction and you cannot serve your customers. Get it wrong in the other and you are paying wages you cannot afford. Human resource planning is the attempt to get it right in advance.
📘 What you need to know
Human resource planning works out how many employees a business needs, with what skills, and when.
Staff are both an asset (skills, ideas, service, reputation) and a cost (wages, training, benefits, redundancy).
Four metrics measure the workforce: labour productivity, labour turnover, labour retention and absenteeism.
Higher productivity means a lower labour cost per unit, which improves efficiency and can become a competitive advantage.
Internal factors shaping the plan: objectives, finances, structure, labour relations, culture.
External factors: the economy, the labour market, technology, the law, social change, politics and competitors.
Staff are an asset and a cost at the same time
This is the tension that runs through the whole of HR. A shop assistant who remembers regular customers by name is worth far more than their wage. That same wage still has to be paid in a month when nobody comes in.
When an exam asks about cutting jobs, both columns belong in the answer. Wages saved on the right often cost you something on the left.
Here is the chain examiners like: better trained staff raise labour productivity, so the labour cost per unit falls, so the firm is more efficient, so it can undercut rivals or take a bigger margin. Learn it as a chain, not four separate facts.
Measuring the workforce
You cannot plan what you do not measure. Four figures do most of the work, and all four appear in calculation questions.
Learn all four formulas. Questions often give you the raw numbers and expect you to choose the right one without being told which.
What the numbers are telling you
Metric
What a worrying figure usually means
Labour productivity
Low output per worker points to poor training, old equipment or weak motivation. Raising it is the main route to lower unit costs
Labour turnover
High turnover suggests poor motivation or pay, weak recruitment that hires the wrong people, or simply better jobs available elsewhere
Labour retention
High retention suggests good motivation and recruitment — though it can also mean staff have nowhere else to go
Absenteeism
Sick pay and temporary cover push costs up, output falls, and the staff covering for absent colleagues get demotivated too
Careful with retention. A very high figure is not automatically good news. In a town with no other employers, people stay because they are stuck, not because they are happy. Always read the retention figure alongside the local labour market.
Internal factors that shape the plan
Factor
How it changes the workforce plan
Objectives and strategy
Entering new markets changes both the number and the type of staff needed. A chain planning to double in size may need thousands of new recruits within a year
Financial situation
Tight budgets limit pay, hiring and training. A firm that stretches to raise salaries often ends up cutting its training spend to pay for it
Organisational structure
Restructuring means redeployment, redundancy or fresh recruitment, sometimes all three at once
Labour relations
Where workers are well organised in trade unions, HR has to negotiate on pay and conditions. Well-supported strike action has won large pay rises. Where organisation is weak, HR has far more freedom
Organisational culture
A firm that genuinely values work-life balance will hire extra staff rather than push existing ones harder. A toxic culture pushes good people out, whatever the pay
External factors that shape the plan
Factor
How it changes the workforce plan
Economic conditions
In a growing economy the problem is attracting and keeping staff. In a downturn it becomes redundancies and hiring freezes
Labour market
Skills shortages, how willing people are to move, and immigration rules all decide who is actually available to hire. Some governments change migration law specifically to fill shortages in trades like construction
Technology
Automation and artificial intelligence change which jobs exist at all, so HR has to plan for re-skilling and up-skilling before the change arrives
Law and regulation
Employment law, health and safety, and rules on working hours set the boundaries. Some countries now protect the right to switch off outside working hours
Social and cultural change
Expectations about diversity, flexible hours, wellbeing and holiday differ sharply between countries and generations
Political factors
Labour law, tax and trade agreements shift with governments, and national skills shortages often trigger training and immigration programmes
Competitive landscape
Pay and benefits have to match what rivals offer. Firms short of applicants increasingly hire on skills and potential rather than formal qualifications, to widen the pool
Worked examples
WORKED EXAMPLE
Define the term labour turnover. [2]
What it measures, then over what periodLabour turnover measures the proportion of employees who leave a business during a given period,usually expressed as a percentage of the average number employed over that year.2 marks
WORKED EXAMPLE
A firm employs an average of 250 staff. During the year 45 employees left. Calculate its labour turnover and labour retention. [4]
Step 1: turnoverTurnover = (45 ÷ 250) × 100Labour turnover = 18%Step 2: retentionStayers = 250 − 45 = 205, so retention = (205 ÷ 250) × 100Labour retention = 82%Notice the two add to 100%. Use that as a quick check on your arithmetic.
WORKED EXAMPLE
A factory of 40 staff had 56 days lost to absence over a month with 20 working days. Calculate the absenteeism rate and explain one problem it causes. [4]
Step 1: how many days were possible?40 staff × 20 days = 800 possible working daysStep 2: calculateAbsenteeism = (56 ÷ 800) × 100Absenteeism = 7%Step 3: one problemThe firm pays sick pay and hires temporary cover, so costs rise while output falls. Remaining staff who cover the work become demotivated, which can push absence higher still.
💡 Exam tip
Show the formula before the numbers. Method marks are awarded even when the arithmetic slips.
Always interpret the figure you calculate. “18%” is one mark; “18%, which is high for this industry and points to poor motivation” is the rest.
Use the asset and cost pair for any question about cutting or hiring staff.
Sort factors into internal and external and say so explicitly. It structures the answer for you.
Quote the stimulus. If the case study mentions a union, a skills shortage or a restructure, that is the factor the examiner wants discussed.
⚠ Common mix-up
Turnover here means staff leaving, not sales. In finance, turnover means revenue. Different topic, different meaning.
Productivity is not the same as production. Production is total output; productivity is output per worker.
High retention is not always good, and some turnover is healthy because it brings in new ideas.
Absenteeism is not just illness. It often signals low morale, which is the more useful thing to say.
HR planning is not just recruitment. It also covers training, deployment, motivation and letting people go.
Up next: How Working Patterns Are Shifting — the plan has to fit the way people actually want to work now, and that has changed more in the last few years than in the previous forty.
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