(Worse) Operational procedures are manipulated so that the parameters can be determined.

(Better) Engineers manipulate operational procedures to determine the parameters.

(Worse) The Taguchi method is thoroughly assessed so that the effect of various factors on performance variation can be understood.

(Better) Designers thoroughly assess the Taguchi method to understand how various factors affect its performance variation.

To increase word variety in a sentence,various,varying,and varied can be used as alternatives to different when the Chinese meaning is 不同的 .

(Worse) The function is minimized so that suitable operating conditions are satisfied.

(Better) They minimize the function to satisfy suitable operating conditions.

To increase word variety in a sentence, satisfy,fulfill, and adhere to can be used instead of always saying meet when the Chinese meaning is 滿足 .

(Worse) The single-response problem is focused on so that a modification of the operating system is made.

(Better) This work focuses on the single-response problem to modify the operating system.

(Worse) The parameter settings for a process must be determined so that variation of the product response is only slight.

(Better) Experienced engineers must determine the parameters for a process so that the product response varies only slightly.

Depending on the sentence‘s context, slightly, negligibly, seldom, and barely can be used as alternatives to little or few when the Chinese meaning is 很少 .

(Worse) The design parameters and noise factors in orthogonal arrays are arranged so that computation of each experimental combination is made.

(Better) They arrange the design parameters and noise factors in orthogonal arrays to compute each experimental combination.

(Worse) A multi-response signal-to-noise ratio is developed so that the optimum conditions in the parameter design stage can be determined.

(Better) This work develops a multi-response signal-to-noise ratio to determine the optimum conditions in the parameter design stage.

(Worse) Whether or not the experimental results are valid can not be verified by human judgement.

(Better) Human judgement can not verify the validity of the experimental results.

(Worse) The effectiveness of the proposed method is demonstrated by analysis results.

(Better) Analysis results demonstrate the effectiveness of the proposed method.

Although the proposed method's effectiveness is more direct than the effectiveness of the proposed method, many journals do not accept the use of apostrophes and contractions.

You should double check with the journal that you are submitting to on their style usage.

(Worse) Applicability of the method could be limited with insignificant t-values of the regression coefficient.

(Better) Insignificant t-values of the regression coefficient could limit applicability of the method.

(Worse) The complexity of the computational process is increased in the presence of the conventional method.

(Better) The conventional method increases the complexity of the computational process.

(Worse) The equation is difficult to explain by Taguchi's quality loss.

(Better) Taguchi's quality loss has difficulty in explaining the equation.

(Worse) A safety valve is contained in the machine for when cautionary measures must be taken by the inspector.

(Better) The machine contains a safety valve for when the inspector must take cautionary measures.

(Worse) Evaluation of the course materials must be made by the class leader.

(Better) The class leader must evaluate the course materials.

(Worse) Design of the system by the engineer is allowed by the department manager.

(Better) The department manager allows the engineer to design the system.