Dear @Beata, of course, certain skills are needed for reviewers and this skills need improvement.

How to improve your writing and reviewing skills ?

http://www.scribendi.com/advice/book_reviewers.en.html

Dear @Beata, I am sure you will write very reliable review of Ph.D dissertation or habilitation thesis. No doubt. Many Universities have a certain guidelines for reviewers. I have attached some good resources, one is from your country, and I do think it will help.

Welcome back dear @Beata! :)

http://web.tuke.sk/tu/habilitacne-konania/svf/kaposztasova/kaposztasova_posudok_slys.pdf

http://www.informatik.tuwien.ac.at/dekanat/GuidelinesforApplicantsandReviewersfortheHabilitationattheFacultyofInformaticsatTUWien.pdf

Thank you very much dear Ljubomir ! I'm back and ready to participate in discussions. :-)

Thank you dear Concha for inspiration. Reviewing PhD /habilitations needs some certain skills and attention too. 

Dear @Beata, of course, certain skills are needed for reviewers and this skills need improvement.

How to improve your writing and reviewing skills ?

http://www.scribendi.com/advice/book_reviewers.en.html

Dear Ljubomir, thank you again for great support and inspiration  :-)

@ Beata, I would advice to look into many resources which are available for the PhD student as how to successfully write a PhD dissertation:

http://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=phd+thesis

If you happen to go through the rationales and explanations given by various authors, you would easily understand what you need to look carefully to review when you had an opportunity sit in an external review panel in a PhD defense. 

http://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=phd+thesis

Dear Pandi-Perumal,

Thank you for support and helpful references. Essential remarks.

Enjoyed reading various perspectives. It is essential to read, rewrite, review and revise again and again !;

In Mathematics, what's not published - does not exist

This holds true everywhere. For a good work is review easier, of course. If you see some problems, well you think about it, do not hurry to conclusions. You should clearly describe any criticism, and it may not be easy.

I wish you much success in the responsible work.

Right Dear George, we in Poland are also obligated to publish habilitation thesis in social sciences (e.g. education). Many well prepared PhD thesis are also published. My question concerned the problem was: how to review the scientific work which is PhD or habilitation thesis, when you are appointed to be a member of commission and reviewer of works for scientific promotion ? Because I needed answers, I participaed in scientific worhshop tit. Scientific Promotions in Warsaw, in October 2015 and know, that there exist many traps for reviewers caused unfortunately by authors of thesis. I'm learning all the time.

Dear Josef, I like your remark about clear description of the criticism. Thank you

Not at all.

Josef