SMT parts order quantities rules

Subscribe to Thread

Hello all, Do you have any written rules to your purchasing... - Aug 19, 2021 by Evtimov

It's more about how difficult to handload the those extra pa... - Aug 19, 2021 by Thomas

We have it set up in our ERP system. When it produces the Wo... - Aug 19, 2021 by Stephen

Hello Stephen, do you know what rules were followed in defin... - Aug 20, 2021 by Evtimov

Tom, my thinking was more towards base it on size and packa... - Aug 20, 2021 by Evtimov

... - Aug 20, 2021 by Thomas

Evtimov

#86962

SMT parts order quantities rules | 19 August, 2021

Hello all,

Do you have any written rules to your purchasing team how many extra parts to buy based on package/price? I am trying to set some rules, as we are seeing terrible setup condition caused by wrong quantities buy.

reply »

Thomas

#86963

SMT parts order quantities rules | 19 August, 2021

It's more about how difficult to handload the those extra parts at the end of kit. i.e. big size connector, doesn't require extra. Micro parts like QFN, QFP would be depend on the kit size; under qty of 50, 1 or 2 extra would be good. If qty over 100, I would suggest +5% extra.

reply »

Stephen

#86965

SMT parts order quantities rules | 19 August, 2021

We have it set up in our ERP system. When it produces the Work Order it adds whatever extra parts we say. And we have a relatively inexpensive system I would think most systems for electronic manufacturing would have that ability.

A few lifetimes ago at another company the purchasing department said that we had lost 1,000,000 100n 0805 caps. But that was over a five year time span IIRC and I suspect at least a little exageration.

reply »

Evtimov

#86967

SMT parts order quantities rules | 20 August, 2021

Hello Stephen, do you know what rules were followed in defining these extra quantities? This is what I am trying to achieve as well. We have the system, the setup is wrong.

reply »

Evtimov

#86968

SMT parts order quantities rules | 20 August, 2021

Tom,

my thinking was more towards base it on size and package definition rather than base it on work orders. If work order requires 10pcs 0201 resistor, having 12pcs on hand doesn't do the job. If it is 50mmx50mm BGA, then 1 extra piece on each 100pcs or none for smaller work orders will be fine.

reply »

Thomas

#86969

SMT parts order quantities rules | 20 August, 2021

reply »