Bro 焦器勃勃, you must be working in a very large corporate which prefers to use the famous software package in the market.
I don't have any experience on using SAP product, but know some of hearsays that US companies like to use Oracle while European companies like to use SAP.
For Oracle Supply Chain Planning, please refer to:
Supply Chain Planning
In addition, Oracle acquired PeopleSoft at the beginning of this year. Therefore, Oracle may offer some other similar software packages from PeopleSoft e.g.
http://www.oracle.com/applications/peoplesoft/scm/ent/index.html
I am not working in Oracle and dunno the cost of these software, but if the cost of the off-the-shelf softare will be around 2.5 - 3 MM, then the investment will be very significant since the investment may need to include computer platform to run the software, customization cost (tailor to specific user requirements) and implementation cost, needless to mention the cost of internal resources to perform system test and user acceptance test, etc.