Sentence:  These amendments to the Vocational Rehabilitation Act were designed to help provide for more specialized rehabilitation facilities , for more sheltered and `` half-way '' workshops , for greater numbers of adequately trained personnel , for more comprehensive services to individuals ( particularly to the homebound and the blind ) , and for other administrative improvements to increase the program 's overall <WSD>effectiveness</WSD> . 
Meaning of the word marked with <WSD> tags:  power to be effective; the quality of being able to bring about an effect