You will receive an email invitation from the journal that includes the manuscript and the Manuscript Review Form. In addition to your availability, please consider whether the topic of this work is within your field of expertise. Please let us know if you are accepting or declining our invitation to review as soon as possible, to minimise delay for the authors. If you are unable to review, we would be grateful if you would suggest an alternative referee.

We usually ask our reviewers to submit their comments within three weeks of agreeing to review a paper, although extensions can be granted. If you do not have time to review the article, please let the editorial office know. Suggestions for alternative reviewers are always welcome.

As a reviewer, it is important that you remain objective in your critical appraisal. You should not allow your personal prejudice about research topics or researchers to influence your judgment. Your comments should be professional and courteous, and should help the author to improve their paper and present their research as clearly and concisely as possible.

If you have reasons to believe that the material is not original or has been plagiarised, please alert the editorial office.

When reviewing a paper, you should take into consideration the following:

Originality and quality: Is the paper of sufficient interest for publication in the journal? Does it contribute significantly to the current state of the research field? Is the topic handled substantively and accurately in appropriate detail and scope?

Structure: abstract, introduction, method, results, conclusion.

Engagement with previous research and results (e.g. does the author engage with current/ relevant research in the field).

If a paper is difficult to understand due to grammatical errors, please mention this in your report.

Please submit your report by replying directly to email (ijqr@kg.ac.rs) and attaching the completed Manuscript Review Form. Please do not change the subject line of the email when responding this way.

If you need any assistance, please contact the editorial office.

If interested in reviewing, please send a letter of interest and curriculum vitae along with “key words,” phrases, or topics that you would be interested in reviewing.

You can also email the editorial office if you would like to recommend a colleague who specializes in the field as an additional reviewer.

Peer review is a critical element of scholarly publication, and one of the major cornerstones of the scientific process. It ensures that published research is sound and properly verified and improves the quality of the research.

Reviewers for Proceedings on Engineering Sciences are selected by the handling editors based on their expertise. Experts volunteer their time and effort to provide scientific critiques of manuscripts submitted to our journal that assist the editors to make informed decisions about manuscript acceptance.

Therefore the editors of Proceedings on Engineering Sciences would like to thank the following colleagues who reviewed on a voluntary basis all manuscripts submitted in 2021. Their help highly improved the quality of our journal.

Marija Zahar Đorđević	Hrvoje Puškarić
Aleksandar Đorđević	Slavko Arsovski
Goran Putnik	Zora Arsovski
Tadeja Jare Jakulin	Tatiana Salimova
Yury Klochkov	Dominik Zimon
Bojan Lalić	Jovan Filipović
Aleksandar Vujović	Jelena Jovanović
Krešimir Buntak	Thu Ya Mon
Sanjay Kumar Jain	Moti Melkamu
Naila Iqbal Qureshi	Ratna Vadra
Chijioke Nwachukwu	Patrick Mphepo
Leila Dariush	Ahmed Asfahani
Edvaldo Farias	Soon Chow Lim
Romel Aceron	Fabio P. D. de Araujo
Ramesh Mande	Sudirman Zaid
Carlos Andrés Tavera Romero	Thomas Meixner
Komal Kumari	Whyte Akpan
Mamik Mamik	Ella Mittal
Michela Poli	Sarmad Hameed
Joko Supono	Elena Posnaya