Question, what contitutes "a successful silicon pour" to move to the next step?

Thanks in advance....

During Series #1 of the process improvement test, the reactor processes the silica and reductant feedstock in batches. During each batch testing, raw material is placed inside the reactor which is then powered up to its operational temperature and taken through the cycle needed to reach a carbothermic reaction. Once the test is complete, the system is powered down and allowed to cool, after which it is inspected while the produced silicon material at the bottom of the reactor is recovered.

Batch tests are currently being performed and will continue until we reach the key milestone of a successful silicon pour from the GEN3 QRR.