I have requested Ms. Yoko to purchase 4 of memories for your all 4 client
PCs.
If you don't feel improved speed of Salon Iris from at all, we should hold
to upgrade memories on client PCs because Salon Iris is mainly executed on
server even you use Salon Iris from client PC. I previously informed
hardware specs on current client PC meet Salon Iris's recommended specs.
Another concern is your network between Server and clients.
Your current network is 100BT and to provide larger bandwidth for more data
transmission, you may need 1000BT network.
Upgrading network infrastructure is kind of hassle, you will need to run new
high-speed LAN cable called CAT6e between Server - client PCs and implement
new 1000BT based network switch in reception and in Hiro's office.
Slow network can be bottle neck even you implement a hi-performance server.
Would you discuss this with Mr. Hiro and Mrs. Yoko?
You can try to upgrade memory on one of client PC to see difference of
speed.