a$.$ The operations management viewpoint focuses on long$-$term planning, while the contingency viewpoint focuses on short$-$term decision making.

b$.$ The operations management viewpoint utilizes motion studies, while the contigency viewpoint emphasizes employee diversity studies.

c$.$ The operations management viewpoint focuses on efficiency and effectiveness, while the contingency viewpoint focuses on flexibility and adaptability.

d$.$ The operations management viewpoint emphasizes predictability and control, while the contingency viewpoint emphasizes uncertainty and unpredictability.

e$.$ The operations management viewpoint focuses on achieving consistent results, while the contingency viewpoint focuses on achieving innovative solutions.

f$.$ The operations management viewpoint emphasizes individual performance, while the contingency viewpoint emphasizes group performance.