Low Level Design (LLD) is like detailing the High Level Design (HLD). It defines the actual logic for each and every component of the system. Class diagrams with all the methods and relation between classes comes under LLD. Programs specs are covered under LLD.

LLD describes each and every module in an elaborate manner so that the programmer can directly code the program based on this.There will be at least 1 document for each module and there may be more for a module. The LLD will contain: - detailed functional logic of the module in pseudocode - database tables with all elements including their type and size - all interface details with complete API references(both requests and responses) - all dependency issues -error message listings - complete input and outputs for a module.

Flow chart, Decision table and decision stub are falling in this design model.

See also

This article uses material from the Wikipedia article Lower level design, that was deleted or is being discussed for deletion, which is released under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
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