Your portfolio can communicate some very specific information about you, if it s properly prepared. The author gives some specific examples. Include a smattering of older works to illustrate your depth, but the bulk of your portfolio should be made up of fairly recent works to show that you are active in the field. By including a certain type of work, you are not only exhibiting your ability, but also a willingness to do that type of work in the future. Don t include examples of work that you re not interested in doing.
Art galleries are less concerned with speed and more concerned with the thoughtfulness of content.
A production potter on the other hand, will want to demonstrate the speed and consistency with which he or she can produce. Tailor your portfolio to fit your own situation. Your portfolio should be appropriate to the type of job or assignment that you are pursuing. This is basic common sense. Appropriateness is important, but quality should be your primary criteria.