The data obtained by this method is more comprehensive and reliable, and there are many units. However, it generally takes a lot of manpower, material resources and time, and the investigation time is long, which is not suitable for the requirements of general enterprises. Only when the product sales range is narrow or there are few users can we use a comprehensive survey. For products with many varieties, large output and wide sales range, comprehensive investigation is not applicable.
Extended data:
A complete plan for a comprehensive investigation
1. purpose of investigation: the purpose of investigation should conform to the objective reality, which is the first problem to be clarified in any set of plans and action guidelines.
2. Survey object and survey unit: the survey object is the whole and the survey unit is the individual in the whole.
3. Investigation items: the meaning of investigation items must be clear and not vague; When designing an investigation project, we should not only consider the needs of the investigation task, but also consider whether we can get the answer; The investigation items should be related to each other as much as possible, so that the obtained data can be compared with each other, so as to understand the reasons, conditions and consequences of the phenomenon change and check the accuracy of the answers.
4. Questionnaire: Generally, there are two forms: single form and list form. List is to put many units' projects in one table, which is suitable for investigating a small number of projects; A single table only registers the contents of one cell in a table.
5. Survey methods and methods: The specific survey methods for collecting statistical data include interviews, observations and reports.
6. Place and time of investigation: determine the place of registration materials and the standard time and time limit of investigation.
7. Organizational plan: ensure the implementation of the specific work plan of the investigation.
Baidu encyclopedia-comprehensive investigation