It has now been confirmed by Tesla in their shareholder’s letter:
“To date, our primary production constraint has been in the battery module assembly line at Gigafactory 1, where cells are packaged into modules. Four modules are packaged into an aluminum case to form a Model 3 battery pack. The combined complexity of module design and its automated manufacturing process has taken this line longer to ramp than expected. The biggest challenge is that the first two zones of a four zone process, key elements of which were done by manufacturing systems suppliers, had to be taken over and significantly redesigned by Tesla. We have redirected our best engineering talent to fine-tune the automated processes and related robotic programming, and we are confident that throughput will increase substantially in upcoming weeks and ultimately be capable of production rates significantly greater than the original specification.”
Based on its current understanding of the bottlenecks, Tesla updated its expected production ramp timeline:
“Based on what we know now, we currently expect to achieve a production rate of 5,000 Model 3 vehicles per week by late Q1 2018, recognizing that our production growth rate is like a stepped exponential, so there can be large forward jumps from one week to the next. We will provide an update when we announce Q4 production and delivery numbers in the first few days of January. With respect to the timing for producing 10,000 units per week, it has always been our intention to implement that capacity addition after we have achieved a 5,000 per week run rate.”
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