CAM Variance December 2025

There is a cumulative schedule variance of -$628k in the cost account 402.04.04.04 CE - Standard Module Assembly Site 2 (CMU). The variance is from the assembly and testing of the first 40% of modules and the associated cleanroom consumables.

This variance is expected, primarily due to missing input parts (baseplates). CMU has received baseplates at the begining of the month and module production has resumed in December. Shipment of the CuT baseplates from IHEP are still awaiting setup of the proper import/export protocol through Fermilab procurement. CMU is demonstrating the 8 modules / day protocol now. When we exercise production with a rate 12/day before the new year.

There is a cumulative cost variance of -$506k in cost account 402.04.04.04 CE - Standard Module Assembly Site 2. This is expected and is consistent with the cumulative schedule variance discussed below. Schedule delays, due to missing input parts, have caused cost variance resulting from labor costs not earning value.

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There is a cumulative schedule variance of -$839k in cost account 402.04.04.05 CE - Module Assembly at UCSB. The variance has two components: most (90%) is due to the assembly, testing, and shipping of full-size equivalent odd-sized modules (1-48%); the remainder is for supporting production at other assembly sites. This past month UCSB produced modules with 12/day protocol. In total, ~130 v3c or v3d modules have been produced.

There is a cumulative cost variance of -$586k in cost account 402.04.04.05 CE - Module Assembly at UCSB. This is expected and is consistent with the cumulative schedule variance discussed above. Schedule delays, due to missing input parts, have caused cost variance resulting from labor costs not earning value.

The activities contributing to this variance are due to upstream delays in receiving input components needed for the final module test stands, resulting in completion later than scheduled. Once the components become available, the value will be earned, and it should not impact the overall schedule.