Chronologize the Kayanid and Pishdadids dynasties since Manuchehr’s era in the Iron age of the Iranian plateau

So far different views have been put forward about two semi-mythical dynasties of Pishdadids and Kayanids. Some call them whole legends, some believe they are the storied versions of the Medes and Achaemenid era, some claims Pishdadids were legend but the Kayanids were historical and some others believe both were two historical distinct dynasties. But whether there is a field exploration about them or design a chronology based on computing library data, Not much effort could be observed. One of the problems is in which part of historical eras could Kayanids dynasty be placed that could be connected to the Achaemenids and Alexander periods. In this article based on the data of various related documents, this chronology is the issue.