2.  (Worse) Operational procedures are manipulated so that the parameters can be determined.  (Better) Engineers manipulate operational procedures to determine the parameters.

3.  (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.

4.  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.

5.  (Worse) The function is minimized so that suitable operating conditions are satisfied.  (Better) They minimize the function to satisfy suitable operating conditions.

6.  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.

7.  (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.

8.  (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.

9.  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.

10.  (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.

11.  (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.

12.  (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.

13.  (Worse) The effectiveness of the proposed method is demonstrated by analysis results.  (Better) Analysis results demonstrate the effectiveness of the proposed method.

14.  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.

15.  (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.

16.  (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.

17.  (Worse) The equation is difficult to explain by Taguchi's quality loss.  (Better) Taguchi's quality loss has difficulty in explaining the equation.

18.  (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.

19.  (Worse) Evaluation of the course materials must be made by the class leader.  (Better) The class leader must evaluate the course materials.

20.  (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.