As stated above, the product life cycle consists of four stages: introduction, growth, maturity, and decline. Figure A illustrates the product life cycle. Determination of a product's stage in its life cycle is not based on age, but on the relationship of sales, costs, profits, and number of competitors.
Proclaim is defined as to announce or declare. An example of to proclaim is to announce that a fight is over. 1  to announce officially; announce to be.
Pro-form is a word or phrase that can take the place of another word (or word group) in a sentence. The process of substituting pro-forms for other words is called proformation. In English, the most common pro-forms are pronouns, but other words (such as here, there, so, not, and do) can also function as pro-forms. (See Examples and Observations, below.) The pro-form is the referring word in a sentence; the word or word group that's referred to is the antecedent.