Bottom-up Development Definition/Meaning:
An approach to program development in which progress is
made by composition of available elements, beginning with the primitive
elements provided by the implementation language and ending when the desired
program is reached. At each stage the available elements are employed in the
construction of new elements that are more powerful in the context of the
required program. These new elements will in turn be employed at the next stage
in the construction of still more powerful elements, and so on until the
available elements can be employed directly in the construction of the desired
program.
In practice, "pure" bottom-up development is not possible; the
construction of new elements must always be guided by a
look-ahead to the requirements of the eventual program, and even then it will
often be discovered at a later stage that some earlier construction sequence was
inappropriate, leading to a need for iteration.
|
