trial-and-error procedure meaning in English

尝试法
试错法步骤

In practice , the predication of the trimming line , which is the reference of trim die design , was decided by trial - and - error procedures . it is not only time - consuming but also expensive . based on the fea , this paper discusses the simulation of the flanging process of large and complex sheet metal parts
在以往的生产实际中，作为设计修边模依据的修边线的确定都是靠不断地试模、修模来决定的，这样不仅影响整个产品的开发周期，而且还造成大量的人力和物力的浪费。
Trajectory designing has been a hot topic for the researchers and many methods have been presented . but most of methods nowadays for designing 3d horizontal wells are based on trial - and - error method . so well trajectory designing depend greatly on the experience of the designer , which lead to the time - consuming trial - and - error procedure while using those kinds of methods
近年来，水平井轨迹设计技术的研究一直较为活跃，相继提出了不少的方法及针对具体问题的具体做法，但这些方法从本质上讲，都未脱离试错法的范畴，井眼轨迹部分参数的确定取决于设计者的经验与直觉。