Apart from the Model Law itself, you may need to closely study the Guide to UNCITRAL Model Law on Public Procurement. That will give you the basis for comparison.  A Model Law of this nature took its source from national legislation (mainly civil and common law) which have been harmonised to come up with such a Model Law. Having this in mind and considering the historical origin and modern development of the Iranian legal system, one will find some basis of comparison.

Learning from the experiences of other jurisdictions might also help. There is this important study from the World Bank: PROCUREMENT, ASSESSING PUBLIC. "BENCHMARKING PUBLIC PROCUREMENT 2016." (2016), available at http://elibrary.worldbank.org/doi/abs/10.1596/978-1-4648-0726-8_fm

You may want to read the following sources:

Arrowsmith, Sue. "Public procurement: An appraisal of the UNCITRAL model law as a global standard." International and comparative law quarterly 53.01 (2004): 17-46.

Baek, Chan Young. "BUILDING A SUCCESSFUL E-PROCUREMENT SYSTEM IN THE UNITED STATES: LESSONS FROM THE SOUTH KOREAN SYSTEM." Public Contract Law Journal 44.4 (2015): 755.

Delmon, Jeffrey. "Creating a Framework for Public-Private Partnership Programs." (2015).

Oh.. Sir thanks a lot for your kindness. As you mantioned i started with Guide to Enactment to underestand what is the main purpose and what is the exactly meaning of some part of regulations.then at the end of that i found a grate comparison between model 1994 and 2011 in a schedulethat is so helpful. Then when i researched and questioned about iran's regulations about public procurement i found that it is admirable follow the international standards in many ways that as soon as i finish my work i share it with any one that interested in knowing more about it.

And at the end, thank you very much for suggestion this sources.

I'm glad you've made some important preliminary findings. 

Good luck in your research!

Hi.

I would like to know if you are interested in doing a joint research on the public procurement law in Iran. If interested, just let me know for more discussing on the issue and aspects I am going to work on.

Regards,

Ladan