Serial Number Issue in ISU

Hi All,

when we create material for isu and then use t-code IQ01 to creat serial number then system pick a number range where did it pick from

For ex- in MM01 i have created a material where in plant view i have maintain (Serialization within the stock material number) and when i creat a serial number then system start with numerical number 1 and so on where does it pick the number range

please help me

thanks and regards

Subhasish ghosh