15. Which of the following is a method for measuring performance? (a) Key performance indicators (KPIs) (b) Balance scorecard (c) Six Sigma (d) All of the above

16. Which of the following is a type of operations research technique? (a) Linear programming (b) Simulation (c) Queuing theory (d) All of the above

17. Which of the following is a trend in operations management? (a) Globalization (b) Technology (c) Sustainability (d) All of the above

18. Which of the following is a challenge facing operations managers? (a) Increasing customer demand (b) Shortening product life cycles (c) Rising competition (d) All of the above

19. Which of the following is a role of operations managers? (a) Planning and coordinating operations (b) Ensuring product quality (c) Managing resources efficiently (d) All of the above

20. Which of the following is a goal of operations management? (a) To produce goods and services efficiently and effectively (b) To meet customer needs and expectations (c) To achieve competitive advantage (d) All of the above