Every figure is derived from documented Greyparrot customer outcomes. The calculator scales each scenario by your throughput and monitored-line count using these formulas:
Optimise throughput & uptime
Monitored share of throughput × 4% uplift × £/tonne material value
Optimise throughput & uptime
Capture residue valuables
Throughput × 15% residue rate × 50% recoverable × 30% realistic capture × £/tonne × line multiplier
Source: UK MRF case where 50% of residue line material was found to be recoverable.
Protect output purity
(Monitored lines − 2) × 0.8 catches per year × £47k saved per catch × throughput factor
Source: European MRF — purity drop diagnosed in 12 minutes via Analyzer alert, vs ~38 hours via manual spot sampling. £47k = avoided reprocessing cost.
Replace manual sampling
Monitored lines × £11,880/year baseline × throughput factor
Source: EU PRF documented 66+ hours per month per line of manual sampling labour eliminated.
Blended material value defaults to £140/t. The three multiplier factors (line multiplier, throughput factor, monitored share) calibrate each scenario for facility size — smaller facilities use the conservative end of each range. These are directional ranges, not committed savings; your actual numbers depend on material mix, recovery targets, and operating patterns.
