gross profit margin example Jstor: Jstor features a tremendous extent of scholastic diaries filtered into its databases, about-facing numerous years presenting for your requirements the actual best research in humanities, sciences and numerous different controls. To get to Jstor you need to be in your college organize, or logged in remotely for it with either a staff or scholar ID. From the end of the 19th century to the early 20th century, car designers focused their energies on the development and innovation of mechanical engineering. First half of the 20th century, all about the basic structure of the car has been invented, automotive designers begin from the outside to improve on modelling, and successively introduced the aerodynamics, fluid mechanics, human body engineering and industrial modelling design (industrial aesthetics), etc 6. Clarity. Plan should be clearly expresses the organization's goals and tasks, clearly expresses the resources necessary to achieve goals and taken by the procedures, methods and means, explicitly expresses the managers at all levels in the rights and duties in the process of execution plan.