CAM Variance November 2025

There is a schedule variance of -$566k 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 32+% of modules and the associated cleanroom consumables.

This variance is expected, primarily due to missing input parts (baseplates). CMU has not received baseplates this month. Ti baseplates have been shipped from CERN. We expect to resume module production in December. Shipment of the CuT baseplates from IHEP are still awaiting setup of the proper import/export protocol through Fermilab procurement. CMU has demonstrated the 4 modules / day protocol. When we receive more baseplates (we have ~200 hexaboards and ~1000 sensors) we will exercise production with a rate of 8 modules / day before moving to 12/day.

There is a cumulative cost variance of -$459k 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.

790

598

There is a cumulative schedule variance of -$790k 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 (1-32+%); the remainder is for supporting production at other assembly sites. This past month UCSB has received and has begun producing modules with 12/day protocol. In total, an additional 26 HD v3c CuW modules have been produced.

There is a cumulative cost variance of -$598k 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.