Reliability Modeling and Analysis of a Diesel Engine Design Phase Based on 4F Integration Technology
Round 1
Reviewer 1 Report
This paper presents a comprehensive reliability analysis and management of diesel engines based on 4F integration technology. In general, the structure of the manuscript is solid and the content is meaningful, and the study shows a fair of engineering application significance. Some of my suggestions for the manuscript are as follows:
1. Authors are advised to check grammar and further polish the language expression of the manuscript.
2. The introduction is not well organized. For example, the authors use only one simple statement to explain the necessity of applying 4F technology. What are the advantages of 4F technology compared to other technologies? Why the use of 4F can improve the deficiencies of other methods requires further clarification to show the significance of the proposed method of this study. Therefore, I recommend that the authors revise the Introduction carefully.
3. The authors are advised to make appropriate revisions to the conclusions. The conclusion part should be concise and compact.
Author Response
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Author Response File: 
Author Response.docx
Reviewer 2 Report
（1）In this paper, FTA is associated with time variable t, so it is not appropriate to call it RFTA. It is suggested to change " repairable system FTA " to "repairable dynamic fault tree".
（2） Figures 13 and 14 only show the data change trend, and there is no specific availability value, which is easy to cause ambiguity. It is recommended to mark the specific availability value on the key time nodes on the diagram.
（3）In this paper, the restriction of "RFTA complies with exponential distribution" should be added to the assumption of RFTA.
（4）In parts 2.1 and 2.2, reliability parameters of components should be processed in advance in quantitative calculation of RFTA and or logic gates.
（5）In the last paragraph of preface 1, " FMECA was used to identify the functional hazards of the diesel engine, FHA was used to evaluate the failure mode analysis of the diesel engine,", it is suggested to be changed to " FMECA was used to identify the reliability functional hazards of the diesel engine, FHA was used to evaluate the safety failure mode analysis of the diesel engine" .
（6）The "Reliability Analysis Process framework of RFTA Method" described in Figure 6 is not complete and clear, so it is suggested to modify it properly.
（7）In the key words, "fault pattern recognition" is not appropriate.
（8）3.2 " The results of the original design institute’s database show that most of the faults were caused by turbines under different working conditions." The expression is inappropriate. It is suggested to change it to "based on the original fault database, it can screen out repeated known faults, so as to improve the work efficiency of analysts."
Author Response
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Author Response File: Author Response.docx
Reviewer 3 Report
The article presents the results on the analysis and control of the reliability of complex systems. The diesel engine was considered as an example of the functioning of the method proposed by the authors.
The article provides a detailed analysis of the literature and a description of existing systems for analyzing the reliability of complex systems. The author's method for integrating reliability analysis methods was formulated in detail. The main advantages of the method are shown on the example of a diesel engine. The graphic material of the article is designed with high quality and competently. The authors carried out a detailed analysis of the obtained data. Conclusions are drawn and recommendations are given.
The article is interesting, logical and well written overall. There are minor comments to improve the article.
1. The annotation looks cumbersome. It seems to me that the abstract can be shortened without losing the quality of the article.
2. It is necessary to more clearly indicate the areas of application of the author's methodology for managing reliability.
3. In ‘Conclusions’ section, there should be a brief summary of what the current work is about and what methods are used to solve what scientific problems, followed by the main conclusions obtained. Therefore, I suggest the authors enrich the Conclusion section.
4. Also it is necessary to indicate directions for further research on this topic in the "Conclusion" section.
In my opinion this article is interesting and worthy. However, the article has a number of shortcomings. To accept this paper for publication in the Applied Sciences, some improvements and revisions are required as specified.
Author Response
Please see the attachment.
Author Response File: Author Response.docx
