Optimisation Techniques for Managing the Project Sustainability Objective: Application to a Shell and Tube Heat Exchanger
Round 1
Reviewer 1 Report
the read the paper and I find it excellent. I don't have any comment to make.
Author Response
Response to Reviewer 1 Comments
Point 1: I read the paper and I find it excellent. I don't have any comment to make. 

Response 1: We are pleased to know that you found our study interesting. We would like to thank Reviewer 1 for taking the time to read our manuscript in detail and providing the corresponding feedback.
Reviewer 2 Report
Very good relevance for the journal and technical quality. Good contribution on the field, good depth of research. The abstract is clear including the specific objective of the work, the techniques employed and the significant results. The linguistic level and the mechanics of writing are appropriate for publication. The references and quotations are clear and the bibliography is updated and relevant. The article is very well organized and the “Conclusions” section includes the significant results of the study.
Minor revision about the capital letters in the title of the paper and in the titles of sections.
Author Response
Response to Reviewer 2 Comments
Point 1: Very good relevance for the journal and technical quality. Good contribution on the field, good depth of research. The abstract is clear including the specific objective of the work, the techniques employed and the significant results. The linguistic level and the mechanics of writing are appropriate for publication. The references and quotations are clear and the bibliography is updated and relevant. The article is very well organized and the “Conclusions” section includes the significant results of the study.
Minor revision about the capital letters in the title of the paper and in the titles of sections. 

Response 1: Thank you for your interest in our study. We really appreciate your positive comments. Following your recommendation, we have made the following changes:
- Title. In the first version of the manuscript, the title was: Optimisation techniques for managing the project sustainability objective: application to a shell and tube heat exchanger. We have introduced the corresponding modifications and now the title is: Optimisation Techniques for Managing the Project Sustainability Objective: Application to a Shell and Tube Heat Exchanger.
- Line 39. 1.1. Framework and general background was replaced by 1.1. Framework and General Background.
- Line 134. 1.2. Literature review was replaced by 1.2. Literature Review.
- Line 163. 1.3. Objectives and novel contributions was replaced by 1.3. Objectives and Novel Contributions.
- Line 205. 2.1. Integrated optimisation method was substituted by 2.1. Integrated Optimisation Method.
- Line 244. 2.2. Optimisation techniques was substituted by 2.2. Optimisation Techniques.
- Line 437. 3.1. Mathematical model was replaced by 3.1. Mathematical Model.
- Line 531. 3.2. MIVES model was changed by 3.2. MIVES Model.
- Line 647. 4. Results and discussions was substituted by 4. Results and Discussions.
- Line 744. 4.1. Comparisons among the different cases was replaced by 4.1. Comparisons among the Different Cases.
- Line 839. 4.2. General results discussion was substituted by 4.2. General Results Discussion.
- Line 893. 4.3. Comparisons with the existing literature was replaced by 4.3. Comparisons with the Existing Literature.
- Line 993. 5. Conclusions and further research was changed by 5. Conclusions and Further Research.
- Line 1051. Appendix A. Mathematical model: additional information was substituted by Appendix A. Mathematical Model: Additional Information.