Yup. Estimation inflation syndrome is a thing. One of my previous jobs suffered from that all the time, on database sizing. How much space does the client ne

Yup. Estimation inflation syndrome is a thing. One of my previous jobs suffered from that all the time, on database sizing. How much space does the client need for this trading app? DBA figures 1k transactions per day at 1kb/record for 1 MB storage, round that up to 1 GB per year, so tell them 10 GB should do for 10 years. CTO hears 10 GB from the DBA, adds his own safety margin factor of 10x, tells the client 100 GB. Client hears 100 GB, adds his own safety margin factor of 10x, tells their operations 1 TB. So now we have a client building a giant SCSI terabyte array (this was when 72 GB SCSI disks were the high end server standard) to hold a database that's a year away from reaching even one gigabyte.