Hi, guys I am new for design, I want to ask what are the difference between MPW 1-8?

Quick summary: (1) MPW-one was the first tapeout and almost nothing worked due to extensive flaws in practically all the tools. Most MPW-one designs were resubmitted for later shuttles. The management processor was a PicoRV32. (2) MPW-two introduced "Caravan" for analog projects. It recently came back from manufacturing and boards have been mailed out to designers. The management processor was changed to a VexRISC, which has remained the case through the rest of the MPW runs. There were still issues with the tools and design which we are attempting to work around in software and firmware. (3) MPW-three and MPW-four have the same Caravel design as MPW-two and are still in process. (4) MPW-five and MPW-six have the same Caravel design as MPW-two but are currently on hold waiting to see if the software/firmware workarounds for the MPW-two design will be sufficient to get most users up and running with testing their chips. If so, then the hold will be lifted and they will be completed, a bit behind schedule. If not, then we will scrap them and try to rework them into another shuttle run. (5) MPW-seven is a new design based on extensive fixes of the tools and PDK, and with a lot of back-up verification using commercial tools. It was very late being submitted to manufacture because of the Caravel design re-work, so we have expedited the run to get it back faster. (6) MPW-eight has the same Caravel design as MPW-seven and is actually more or less on schedule. Also in there are several ChipIgnite runs (paid shuttle runs, mostly paid by universities for classwork designs, and the IEEE-SSCS program, which has its own slack channel here), and most recently, the first of the open MPW runs for the GF180MCU process (which has a Caravel design that is much like the sky130 one but a bit reduced in size and scope due to the larger feature size of the process).