所谓层叠式调研是指已完成的调研课题做进一步的跟踪研究。第二次是第一次的补充和深化,第一次是第二次的先决条件。有必要的调研课题可层叠几次,一次比一次更完善,更省力,效果更佳。开展层叠式调研首先要针对性进行对一些有实用价值的情报调研,但一时没有被更多人所认识,往往需要情报研究人员进一步做工作,进一步积累资料,进一步充实完善原有调研报告,根据新情况提出解决问题的新方法、新建议。层叠式调研不需要情报研究人员耗费过多的精力,可以在进行其他项目的同时过问、追踪,这是层叠式调研的特点。地、市级情报研究所在结合本地实际,围绕攻关项 The so-called cascaded research refers to the research topics that have been completed for further follow-up research. The second time is the first supplement and deepening. The first is the second prerequisite. The necessary research topics can be stacked several times, once more perfect, more labor-saving and better. To carry out cascading research, we must first carry out targeted research on some practically valuable intelligence. However, it has not been recognized by more people at one time, and often requires intelligence researchers to do further work to further accumulate information and further enrich and improve the original research report. The new situation proposes new methods and new suggestions for solving problems. Cascading investigations do not require the intelligence researchers to spend too much energy and can interrogate and follow up on other projects. This is a characteristic of the cascading research. Local and municipal intelligence institutes combine local realities and focus on the key projects