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Sample text

He divides the overall task into subsidiary tasks, and these into operational and implementational tasks. He also examines (but fails to present in systematic form) the numerous interrelationships between the identifiable constraints designers must take into account. Wögerbauer himself does not proceed to a systematic elaboration of solutions. His systematic search starts with a solution discovered more or less intuitively and varied as comprehensively as possible in respect to the basic form, materials and method of production.

Calculation and laying out must go hand-in-hand. Designers start with what they are given and with ready-made assemblies. As soon as possible, they should make scale drawings to ensure the correct spatial layout. Calculation can be used to obtain either rough estimates for the preliminary layout or precise values that are used to check the detail design. 107], upon examining the load paths in machine parts, gave the following advice: for a rigid connection, join the parts in the direction of the load; if flexibility is required, join the parts along indirect load paths; do not make unnecessary provisions; do not over-specify; do not fulfil more demands than are required; save by simplification and economical construction.

For example, the system element g could be treated as a subsystem whose function is to convert the actuating force into a larger normal force acting on the friction surface, and through its flexibility provide some equalisation of the wear. Which viewpoint is used to divide the system depends on the intended purpose of the division. Common viewpoints are: • Function: used to identify or describe the functional relationships • Assembly: used to plan assembly operations • Production: used to facilitate production and production planning.

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