KKPH (Collective Entry) is a standard SAP transaction code available within R/3 SAP systems depending on your version and release level.
Below for your convenience is a few details about this tcode including any standard documentation available. In-order to use this transaction within your SAP system simply enter it into the command input box located in the top left hand corner and press enter. Here are a few additional command options available to use when doing this.
SAP Menu->Accounting->Controlling->Product Cost Controlling->Cost Object Controlling->Product Cost by Period->Master Data->Cost Object Hierarchy->Fast Entry for Cost Object Hierarchy
SAP Menu->Accounting->Controlling->Product Cost Controlling->Cost Object Controlling->Intangible Goods and Services->Cost Object->Cost Object->Collective Entry
For futher details and documentation see program RKKPKTR0.