2.3.4 - Resource management

A production method determines how work and resources are organised. The best fit depends on output volume, variety, customisation, skill, capital and required speed.

Job production can create pride and meet individual specifications. Batch spreads set-up over several units. Flow can produce consistently at speed. Cell production can reduce movement, strengthen ownership and identify quality problems within a team.

Productivity relates output to one unit of input during a stated period. Labour productivity and machine productivity therefore need an identified input and consistent time unit.

If 8 employees produce 960 units in a 6-hour shift, labour productivity is 960 ÷ 8 = 120 units per employee per shift, or 20 units per employee-hour. A machine producing 12.5 units per minute needs 70,000 ÷ 12.5 = 5,600 minutes, or 93.33 hours.

A business is productively efficient when it produces output at the minimum possible average cost, making effective use of labour, capital and materials.

If annual total cost is $420 million and output is 26 million items, average cost is$420m ÷ 26m = $16.15 per item. The calculation describes current unit cost; efficiency asks whether resources could produce that output at a lower average cost.

Labour-intensive production relies mainly on human effort and skill; capital-intensive production relies mainly on machinery, equipment or technology. Most businesses use both, so the distinction is about relative emphasis.

A handmade product may support differentiation and premium pricing, while automation may reduce unit cost once output is high enough. A hybrid can allocate precise repetitive stages to machinery and complex finishing or service to skilled employees.

Product lead-in time is the time from obtaining inputs and beginning development or production to making the finished product available to the customer. Shorter time can create competitive advantage in dynamic markets.

Lead-in time can fall through nearby or reliable suppliers, flexible teams, digital information, modular design and efficient production. These choices may also reduce inventory, but the business must preserve specification, safety and quality.

Speed matters most where tastes change quickly or customers value prompt delivery. It may matter less for bespoke products where customers accept waiting for craftsmanship, or where faster production raises defects and returns.

Capacity utilisation is the percentage of maximum possible output that a business actually achieves during the same period.

A restaurant that serves 1,110 lunchtime customers when it could serve 1,500 has utilisation of (1,110 ÷ 1,500) × 100 = 74%. A bus carrying 19 passengers from 45 seats has (19 ÷ 45) × 100 = 42.22%.

Under-utilisation means resources exceed current output needs; over-utilisation means resources operate so close to their limit that they become overstretched.

Under-utilised transport may retain frequent departures because convenient times protect market share and cope with seasonal peaks. Over-utilised production may postpone maintenance or training, increasing defects and making it impossible to meet an additional order.

The effect depends on duration, demand variability, cost structure and service promise. Some spare capacity is resilience; persistent spare capacity may be wasteful. Near-full use can be efficient briefly but fragile if there is no room for disruption.

Capacity utilisation can be improved by bringing actual output and maximum capacity into a more suitable relationship. The required direction depends on whether capacity is under- or over-used.

Match the response to the cause and expected duration. Flexible working or shared space can absorb variable demand without a permanent capacity commitment; expansion is stronger when demand is durable and finance is available.

An inventory control diagram normally places time on the horizontal axis and inventory level on the vertical axis. Falling lines show use; vertical rises show deliveries.

Read the axes and scale first. Trace backward from a delivery to the earlier point where the re-order level was reached. If inventory rises from 25 to 95 units, the order quantity is 70 units; if re-order occurs in week 3 and delivery in week 8, lead time is 5 weeks.

Buffer inventory is an emergency reserve held above zero to reduce the chance that unexpected demand or delayed supply stops sales or production.

A business with unreliable suppliers, long lead times or costly stock-outs may justify a larger reserve. A seller of perishable goods, a firm with stable rapid replenishment, or a business short of cash may prefer a smaller one.

Choose buffer size by comparing the probability and consequence of shortage with holding cost. Better forecasting, supplier reliability and shorter lead time can reduce the reserve needed without accepting the same stock-out risk.

Inventory control aims to hold enough inputs or finished goods for operations and sales without holding an unnecessarily costly surplus.

For a seasonal seller, excess stock after the event may have little resale value, while shortage during the event permanently loses the sales opportunity. The same quantity can therefore be too high after demand and too low before it.

Use updated demand evidence, accurate records, re-order levels, stock rotation, supplier lead-time monitoring and appropriate buffers. Each control has administrative cost, so precision should match the inventory's value and risk.

Just in time (JIT) arranges for inputs to arrive shortly before they are needed, keeping raw materials, work in progress and finished inventory to a minimum.

JIT is stronger where suppliers are nearby or dependable, lead times are short, information is accurate and production is coordinated. A business facing long, uncertain international supply or safety-critical availability may retain buffer inventory.

JIT supports waste minimisation and lean production because excess materials and waiting are reduced. Its success comes from process reliability, not merely ordering less inventory.

Waste minimisation reduces materials, time, energy, movement and output that do not add value for the customer. This can improve efficiency and lower unit cost.

Perishable inputs, uncertain sales and long transport make waste harder to control. Historical demand, modern tracking, chilled storage and using older stock first may reduce losses, but each method has a cost.

Lean production is an approach that removes activities and resources that do not add customer value while preserving the quality and flow customers require.

Lower material, space, time and defect costs can support lower prices or higher margins. Faster, more reliable delivery and consistent quality can strengthen reputation, repeat purchase and differentiation.

Competitive advantage depends on implementation and rivals. JIT can fail when supply is unreliable; fewer resources can leave no recovery margin; training and redesign cost money. A large rival may match the savings or compete through a different strength.

Quality means how well a product or service does what it is intended to do. Control, assurance and quality circles improve it through different responsibilities and timing.

Assurance may suit complex or high-value output where prevention matters; final control can remain useful in mass production or for safety checks. Circles are strongest where employees understand the process, can collaborate and trust managers to respond.

Total Quality Management (TQM) is an organisation-wide culture in which every employee and process is responsible for meeting customer requirements and preventing defects.

Fewer recalls, returns and repairs can reduce waste and cost; reliable output can strengthen trust and repeat purchase. TQM is especially valuable where a fault is costly or damages a warranty and reputation.

Implementation needs leadership, time, training, reliable data and employee commitment. It may initially add cost or slow a process, and production-focused TQM cannot by itself correct a poor product design or missing customer demand.

Kaizen is continuous improvement through frequent, incremental changes suggested and implemented close to the work. It treats today's process as capable of becoming better.

Small changes usually require less finance and disruption than a major redesign. Participation can improve motivation and reveal practical problems managers cannot see, while accumulated gains can reduce waste and unit cost.

Managers need to listen, provide time and feedback, share useful measures and avoid punishing the reporting of problems. Some situations still require a radical technology or capacity change rather than incremental adjustment.

Quality management can create competitive advantage by delivering a product or service consistently at the level customers expect, making the business more attractive than rivals.

Importance varies with product risk, price, customer expectations and ease of switching. For an expensive technical product, failure and return costs make quality crucial; in another market, speed, price or range may matter more.

Quality and speed can reinforce one another: preventing defects avoids rework and shortens delivery. They can also conflict if rushed output weakens checking. The strongest system manages both rather than assuming one universal priority.