producing-semi-finished-partsProcuring semi-finished parts is a major task.Rotor disks are a typical example of this.Is the required materialavailable on the market?Is the desired raw part formavailable?Is the potential supplierapproved for aircraft engineparts?Is the specific part rated/certified? (e.g. rotor disk?)Short delivery times?Acceptable raw part costs?Are the required processsteps and quality assurancemeasures ensured?YesYesYesYesYesYesAlternative material-Costs for design data andrating: 10x106 EUR;Time: Years. No No No No No NoDevelopment and ratingof alternative raw part forms can take several years and be very costly.Approval can take severalmonths and incur veryhigh costs (e.g. cyclical spin tests).Is "double-sourcing" possible?Rating can take severalmonths and be very costly(e.g. cyclical spin tests).This includes especiallythe melting and forgingprocesses.Kann take months to years.What kind problems can be expected with "budget options"?Suitable for working into afinished part