Ключевые слова: abstract, advertisement, advice, analysis, assistance, assurance, background, best, business, certificate, certification, choice, client, commerce, company, concept, conceptual, consulting, control, customer, discovery, excellence, excellent, focus, good, high, improvement, insurance, isolated, management, marketing, offer, performance, positive, product, production, quality, quality control, research, sale, satisfaction, service, sharpened, strategy, success, text, warranty, word, work,