令和2年度 ITパスポート試験 問24

※ Our check while writing this explanation could not fully confirm the published answer; scoring follows IPA's official key.

• ×Incorrectア

  “It enables grasping the required quantity of materials so that optimal ordering can be done” is the effect of MRP (Material Requirements Planning), which calculates the required quantities of parts and materials and their ordering timing based on the production plan. It is not an effect of CAD, which supports design.

• ×Incorrectイ

  “It enables automation of production processes and unmanned operation of tasks” is the effect of FA (Factory Automation) or FMS, which automate manufacturing processes with machines and robots. CAD supports the design stage and is separate from making the production floor unmanned.

• ×Incorrectウ

  “It enables integrated management of a series of processes related to production” is the effect of CIM (Computer Integrated Manufacturing), which integrates everything from design through manufacturing and production management into a single information system. It refers to a broader integration mechanism than CAD alone.

• ○エ

  正解 CAD (Computer Aided Design) is a mechanism that uses a computer to perform design and drafting. Because drawings and the shapes of parts are handled as digital data, past design data can be called up for partial modification and reuse, so there is no need to redraw the design of a similar product from scratch. Therefore, choice エ, “It makes it easier to reuse design data and thereby improve work efficiency,” is the most appropriate effect of introducing CAD.