Sentence:  These factors practically insure that no single financing formula is feasible ; each situation must be <WSD>studied</WSD> and a plan developed that takes into consideration such factors as the effect of the existing and prospective tax calendars , the financial condition of the treasuries , and the length of the transition interval . 
Meaning of the word marked with <WSD> tags:  consider in detail and subject to an analysis in order to discover essential features or meaning