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DIFFERENT BETWEEN TOP DOWN & BOTTOM UP APPROACH

Avatar 37a3bd7bc7328f0ead2c0f6f635dddf60615e676e6b4ddf964144012e529de45 ROSHNI asked about 3 years ago

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5 Answers
Avatar 37a3bd7bc7328f0ead2c0f6f635dddf60615e676e6b4ddf964144012e529de45 CA Sandeep Bohra answered almost 3 years ago

-Top down design proceeds from the abstract entity to get to the concrete design. Bottom up design proceeds from the concrete design to get to the abstract entity. -Top down design is most often used in designing brand new systems, while bottom up design is sometimes used when one is reverse engineering a design; i.e. when one is trying to figure out what somebody else designed in an existing system. -Bottom up design begins the design with the lowest level modules or subsystems, and progresses upward to the main program, module, or subsystem. With bottom up design, a structure chart is necessary to determine the order of execution, and the development of drivers is necessary to complete the bottom up approach. -Top down design, on the other hand, begins the design with the main or top-level module, and progresses downward to the lowest level modules or subsystems. -Real life sometimes is a combination of top down design and bottom up design. For instance, data modeling sessions tend to be iterative, bouncing back and forth between top down and bottom up modes, as the need arises.

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Avatar 37a3bd7bc7328f0ead2c0f6f635dddf60615e676e6b4ddf964144012e529de45 narahari answered almost 3 years ago

Top down design proceeds from the abstract entity to get to the concrete design. Bottom up design proceeds from the concrete design to get to the abstract entity. Top down design is most often used in designing brand new systems, while bottom up design is sometimes used when one is reverse engineering a design; i.e. when one is trying to figure out what somebody else designed in an existing system.

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Open uri20170510 32134 tcchcu?1494421832 Jitendra Suthar answered about 3 years ago

Hiiiii Roshni..... **Difference B/W Top down and Bottom up approach are:** These are some of difference which can be seen above. Regards,

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Avatar 37a3bd7bc7328f0ead2c0f6f635dddf60615e676e6b4ddf964144012e529de45 lochan answered about 3 years ago

**TOP DOWN AND BOTTOM UP APPROACH** Top down design proceeds from the abstract entity to get to the concrete design. Bottom up design proceeds from the concrete design to get to the abstract entity. Top down design is most often used in designing brand new systems, while bottom up design is sometimes used when one is reverse engineering a design; i.e. when one is trying to figure out what somebody else designed in an existing system. Bottom up design begins the design with the lowest level modules or subsystems, and progresses upward to the main program, module, or subsystem. With bottom up design, a structure chart is necessary to determine the order of execution, and the development of drivers is necessary to complete the bottom up approach. Top down design, on the other hand, begins the design with the main or top-level module, and progresses downward to the lowest level modules or subsystems. Real life sometimes is a combination of top down design and bottom up design. For instance, data modeling sessions tend to be iterative, bouncing back and forth between top down and bottom up modes, as the need arises. Thanks

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Data?1494421730 rohit awasthi answered about 3 years ago

Dear Roshni > TOP DOWN & BOTTOM UP APPROACH Both are system development approaches. DIFFERENT BETWEEN TOP DOWN & BOTTOM UP APPROACH Thanks

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