most often during those or other scientific studies used hypothetical method in which the speculation about the cause, cause certain effects.Then, this hypothesis is tested empirically, that it can be called a statement.All of this requires a certain amount of time and money, as to obtain reliable results necessary to conduct several experiments with the same source data.Reduce the number of parallel investigations and options combination of different factors will carefully executed experimental design.
This can be achieved by selection of the test conditions under which the results of statistical processing of the output parameter values will make appropriate conclusions about the process under study.Design of Experiments includes finding a particular mathematical model, which will most closely describe the process under study.Selection is effected by a plan information analysis matrices.It is worth noting that the implementation of the statistical analysis of the experimental data, and its performance is directly dependent on the plan.When choosing a plan, you must:
- determine the criteria of experimental design;
- develop a model that most closely will describe the structure and nature of the relationships in the investigated object or process;
- make a comparison of the resulting model with existing standard plans.Based on the resulting analysis to select the best plan.
theory of experimental design is widely used in various branches of science and technology.At the same time, going to a particular topic, it is necessary to consider some nuances and peculiarities of the scientific field in order to properly prepare and conduct empirical research, the purpose of which in most cases is to find the optimal conditions in which the parameters of the object (system response) have extreme values,have reached their maximum or minimum.
planning the experiment to minimize time, especially when exposed to a number of different factors on the final result of the experience, and the consumption of material resources.Every experience can bring the researcher much information as possible.This can be achieved only if the proper preparation and conduct of the practical part.
Planning and organization of the experiment provides
- choice of varied factors.It is necessary to select the most significant variables that affect the response function.You can define them in the course of the preliminary exploratory experiments, literature review;
- determine the number of levels of each of the varied factors.In this case determined either qualitative or quantitative level value, which also may be either fixed or random.Some specific advice on finding the interval of the factors does not exist, therefore the paragraph should refer to the literary sources to determine the possible ranges of the factor, or use their personal experiences;
- determining the required number of measurement values of the response function.This amount depends on the established limits, the accuracy and the possible influence of other factors on.
Thus, the experimental design - is a powerful tool in the hands of every scientist, which drastically reduce the period of study and improve their accuracy to the required level.Each researcher has to know not only the method, but also successfully put it into practice in order to reach the goal with minimal effort.
