Part A: Foundations of quality
The origin and evolution of quality management
Key takeaways
- KS ISO 9000 defines quality as the degree to which a set of inherent characteristics of an object fulfils requirements, and a requirement may be stated, generally implied or obligatory.
- Quality control is detection applied to output that already exists; quality assurance is prevention, giving confidence before and during the work that requirements will be met.
- Grade is a category for items of the same functional use but different requirements; quality is achieved or missed within it, so a budget hotel can be high quality at a low grade.
- The five eras, craftsmanship, inspection, statistical quality control, quality assurance and total quality management, overlap rather than replace one another.
- The business case rests on customer retention, cost reduction, market access, regulatory exposure and employee engagement, and is strongest when the loss is worked out in shillings.
Quality is not a modern invention, but managing it as a system is. This chapter traces how the discipline moved from a craftsman checking his own work, through inspection departments, to the management system this paper spends the rest of its chapters describing. The history matters for the exam because each stage left behind a technique still in use, and an examiner will ask you to say which stage a given practice belongs to.
What quality means
KS ISO 9000, the Kenya Standard that supplies the vocabulary for the whole ISO 9000 family, defines quality as the degree to which a set of inherent characteristics of an object fulfils requirements. Three words in that definition carry the weight.
Because requirements can be stated, implied or obligatory, quality is always relative to somebody. A matatu operator and a NTSA inspector judge the same vehicle against different requirement sets, which is why the chapter on the context of the organisation makes identifying interested parties a formal step rather than an assumption.
Quality is not the same as grade
This distinction is examined almost every sitting. A Nairobi budget hotel that delivers exactly what it advertises, clean and on time, is high quality at a low grade. A luxury lodge with dirty linen is low quality at a high grade. Say so explicitly if a question invites you to equate quality with expense.
The five quality eras
The discipline is usually presented as five overlapping eras. They overlap rather than replace one another: a Kenyan tea factory today still inspects (era 2) while running SPC on its withering troughs (era 3) inside a certified management system (era 4).
The five eras of quality management, and what each one added
| Era | Period | Focus | Who owned quality | Typical technique |
|---|---|---|---|---|
| Craftsmanship | Pre-1900 | The finished article | The individual craftsman | Personal skill and self-inspection |
| Inspection | 1900s-1930s | Sorting good from bad | A separate inspection department | 100 per cent final inspection, gauges |
| Statistical quality control | 1930s-1950s | The process, not the item | Trained specialists and engineers | Control charts, acceptance sampling |
| Quality assurance | 1950s-1980s | Preventing failure before it occurs | All functions, coordinated | Quality manuals, cost of quality, audits |
| Total quality management and business excellence | 1980s to date | The whole organisation and its customers | Everyone, led from the top | Continual improvement, excellence models, certification to ISO 9001 |
Two dates anchor the modern era. ISO published the first ISO 9000 series in 1987, giving the world a single auditable specification for a quality management system. The current edition, ISO 9001:2015, is adopted in Kenya as KS ISO 9001:2015 and is the standard Kenyan certification bodies audit against.
Kenya's own institutional history runs alongside it. The Kenya Bureau of Standards was established by the Standards Act (Cap 496) in 1974 as the national standards body. The Kenya Accreditation Service (KENAS) was created much later, in 2009, to accredit the laboratories and certification bodies that assess conformity. Introduction to Standardization and the whole of Quality Infrastructure and Legal Framework develop this national quality infrastructure.
The business case
The business case is usually argued on four fronts, and an exam answer that names all four scores better than one that argues cost alone.
- Customer retention: it costs several times more to win a new customer than to keep an existing one, and a defect is the commonest reason a customer leaves
- Cost reduction: scrap, rework, warranty claims and recalls are pure loss, and they fall as prevention rises (the cost of quality argument developed in Quality Improvement and Excellence Models)
- Market access: many export markets and most public tenders in Kenya require a certified system or a KEBS Standardisation Mark, so quality is a licence to trade rather than a differentiator
- Regulatory and legal exposure: the Standards Act, the Food, Drugs and Chemical Substances Act (Cap 254) and the Consumer Protection Act, 2012 all impose duties that a working quality system is the practical means of discharging
- Employee engagement: clear standards, competent training and visible improvement reduce the friction and rework that make work frustrating
Why quality management pays: a Kenyan tea factory
A KTDA-managed factory processes 6,000,000 kg of made tea a year.
Before improvement: 3 per cent of output is downgraded at the Mombasa auction
because of poor fermentation control.
Downgraded volume = 6,000,000 x 3% = 180,000 kg
Price penalty on downgraded tea = KES 40 per kg
Annual loss = 180,000 x 40 = KES 7,200,000
The factory installs fermentation-time control charts and retrains operators.
Cost of the intervention: KES 900,000 in the first year.
Downgrade rate falls to 1 per cent.
New downgraded volume = 6,000,000 x 1% = 60,000 kg
New annual loss = 60,000 x 40 = KES 2,400,000
Saving = 7,200,000 - 2,400,000 = KES 4,800,000
Net first-year benefit = 4,800,000 - 900,000 = KES 3,900,000
Return on the intervention = 3,900,000 / 900,000 = 433%
Quantify, do not assert
Where a question gives you volumes and unit penalties, the marks are in the arithmetic, not in the sentence 'quality improves profitability'. Show the loss before, the loss after, the cost of the intervention, and the net figure, as the worked example does.
Self-check
Distinguish quality from grade, using an example drawn from the Kenyan hospitality industry. (4 marks)
Outline the five eras in the evolution of quality management, stating for each era who was regarded as responsible for quality. (10 marks)
Explain four reasons why a Kenyan manufacturer seeking to export to the European Union would invest in a quality management system. (6 marks)
Show worked answer
Quality versus grade (4 marks, 2 for the distinction and 2 for the example).
Quality is the degree to which inherent characteristics fulfil requirements; grade is a category assigned to items of the same functional use but different requirements. Grade is chosen, quality is achieved or missed.
Example: a budget hotel in Nairobi's CBD advertising a clean room, hot water and breakfast, and delivering all three consistently, is high quality at a low grade. A five-star Diani beach resort with a non-functioning air conditioner and a late transfer is low quality at a high grade.
The five eras (10 marks, 2 per era: 1 for the era and focus, 1 for who owned quality).
1. Craftsmanship, pre-1900: the individual craftsman made and checked the whole article himself.
2. Inspection, 1900s to 1930s: a separate inspection department sorted conforming from non-conforming output after production.
3. Statistical quality control, 1930s to 1950s: trained specialists monitored the process itself using control charts and acceptance sampling.
4. Quality assurance, 1950s to 1980s: all functions shared responsibility, coordinated through quality manuals, audits and cost-of-quality reporting.
5. Total quality management and business excellence, 1980s to date: everyone in the organisation is responsible, led from the top, with continual improvement and certification to ISO 9001.
Four reasons for a Kenyan exporter (6 marks, 1.5 per reason).
1. Market access: EU buyers and retail chains routinely make ISO 9001 certification a condition of supply, so the system is a precondition of the contract rather than a competitive extra.
2. Regulatory conformity: exported goods must satisfy both KEBS requirements at home and the destination market's technical regulations, and a documented system is how conformity is evidenced at the border.
3. Cost reduction: rejected consignments, air-freighted replacements and demurrage at Mombasa are avoidable losses that prevention removes.
4. Customer confidence and retention: an audited system gives a distant buyer, who cannot inspect the factory, objective evidence that consistency will be maintained across shipments.