Preform

v. mold beforehand, form in advance; shape in advance; assemble beforehand

A preform is material that has undergone preliminary shaping but is not yet in its final form.
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Verb
1. form into a shape resembling the final, desired one
(hypernym) shape, form, work, mold, mould, forge
2. form or shape beforehand or determine the shape of beforehand
(hypernym) shape, form, work, mold, mould, forge
(derivation) preformation, theory of preformation

(v. t.)
To form beforehand, or for special ends.
  

     perform