How do you calculate accepted output during a CAM ramp?

Multiply output per cycle by planned cycles for gross output, then multiply by uptime and by first-pass release yield. Here 4 kg/cycle x 480 cycles = 1,920 kg gross, x 0.90 x 0.97 = 1,676.16 kg accepted.

How much output is lost to downtime in the example?

Gross output is 1,920 kg and uptime is 90%, so 10% (192 kg) is lost to downtime before yield is even applied.

How much is held or reworked in the example?

After downtime, 3% of the running output fails first-pass release at 97% yield, which is 51.84 kg held or reworked, leaving 1,676.16 kg accepted.

What is a realistic first-pass release yield during a CAM ramp?

Mature high-nickel lines can exceed 97-99%, but early in a ramp first-pass yield often sits in the 80-92% range while morphology and residual lithium are tuned. Use the lower end for early ramp planning.

Why separate uptime from yield instead of using one efficiency number?

They have different fixes: uptime is an equipment and scheduling problem, yield is a process and quality problem. Splitting them, as this tool does, tells you whether to chase the 192 kg downtime loss or the 51.84 kg yield loss first.

Can I use this for steady-state capacity, not just ramps?

Yes, but set uptime and yield to steady-state values. The tool is framed for ramps because that is when both numbers are most depressed and most uncertain.

Cathode Active Material & Precursor Manufacturing calculator

Production Ramp Planner Calculator

The production ramp planner projects how many kilograms of saleable cathode active material or precursor you will actually release during a capacity ramp, after losses to downtime and first-pass yield. New CAM lines and reactor trains rarely hit nameplate immediately; uptime is suppressed by commissioning stops and first-pass release yield lags as particle morphology, residual lithium and trace metals are dialed in. Operations and supply-chain planners use this to set realistic committed volumes for offtake customers during the ramp, rather than promising gross nameplate that the line cannot release. It separates gross output from the portion lost to downtime and the portion held or reworked, so each loss bucket can be attacked.

What this calculator does

Estimate accepted CAM or precursor output during a production ramp after planned cycles, uptime, and first-pass release yield are applied.
Use it when production ramp planner in cathode active material and precursor manufacturing is being asked to take on more work and you need to know if there is room.
It computes gross ramp output from cycle output and cycle count, then derates it by uptime and first-pass release yield to give accepted (released) output, with explicit downtime and held/reworked losses.

Formula used

Gross ramp production output = ramp output per production cycle × planned ramp cycles
Accepted ramp production output = gross ramp production output × expected ramp uptime × expected first-pass release yield

Inputs explained

Ramp output per production cycle:
Planned ramp cycles:
Expected ramp uptime:
Expected first-pass release yield:

How to use the result

Use it during ramp planning to set customer-committable volumes, or to test how an uptime or yield improvement changes releasable tonnage.
It applies single static uptime and yield figures across the whole ramp; in reality both improve over the ramp curve, so a single-point estimate can understate late-ramp output and overstate early-ramp output.

Common questions

How do you calculate accepted output during a CAM ramp? Multiply output per cycle by planned cycles for gross output, then multiply by uptime and by first-pass release yield. Here 4 kg/cycle x 480 cycles = 1,920 kg gross, x 0.90 x 0.97 = 1,676.16 kg accepted.
How much output is lost to downtime in the example? Gross output is 1,920 kg and uptime is 90%, so 10% (192 kg) is lost to downtime before yield is even applied.
How much is held or reworked in the example? After downtime, 3% of the running output fails first-pass release at 97% yield, which is 51.84 kg held or reworked, leaving 1,676.16 kg accepted.
What is a realistic first-pass release yield during a CAM ramp? Mature high-nickel lines can exceed 97-99%, but early in a ramp first-pass yield often sits in the 80-92% range while morphology and residual lithium are tuned. Use the lower end for early ramp planning.
Why separate uptime from yield instead of using one efficiency number? They have different fixes: uptime is an equipment and scheduling problem, yield is a process and quality problem. Splitting them, as this tool does, tells you whether to chase the 192 kg downtime loss or the 51.84 kg yield loss first.

Last reviewed 2026-05-12.