@Adıvar , Altay is Otokar's first tracked armoured vehicle project. There was no experience before that.
Beyond that, motor and transmission, all electronic and almost all mechanical systems, chassis design and tracked systems, weapons and countermeasures systems, all optical systems; delivered from subcontractors. Otokar was prototype integrator as a main contractor . All coordination provided by SSM ( including all purchases ) Otokar was the center for the execution of the test process(from TSK) and for the elimination of deficiencies that occurred in this process. Also prototype production and mass production are very different subjects. You do not care about manufacturing engineering, but the subject is not only the vehicle itself, also the production system within the specified costs.And they probably also offered to take overseas support in this area.
Personally, I wanted Otokar to take this tender. But our approach to the subject is different.
PS: Defense Industry Undersecretary: After signing mass production deal, the calendar for the first mass production tank is 18 months.
In this case, BMC gave approximately the same bid as Otokar by time interval. Lower costs are possible. Still, system integration is still a serious problem.