AN AIR CARRIER CREW'S ROUTING WAS CHANGED FROM THE SLC QUENN2 ARRIVAL TO THE DELTA TWO DIRECT JAMMN. THE CREW SELECTED DIRECT JAMMN THEN THE JAMMN FOUR AND SO MISSED AN ALTITUDE CONSTRAINT AT HEIRY.

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I WAS THE CAPT (PLT MONITORING). WE WERE ESTABLISHED ON THE QWENN2 ARR INTO SLC PRIOR TO THE DTA VORTAC. ENRTE TO THE FIX; ATC ISSUED A RERTE CLRNC SINCE THEY HAD SUDDENLY CHANGED FROM A NORTHERLY TO SOUTHERLY FLOW. WE WERE ISSUED THE CLRNC; 'COMPANY NUMBER IS NOW CLRED DIRECT TO JAMMN AND THE DELTA 2 ARR; DSND AND MAINTAIN 13000 FT.' AS THE PLT MONITORING; I COPIED THE CLRNC WITH THE PF; INPUT THE CHANGES INTO THE FMC. AS THE PF WAS INPUTTING THE NEW CLRNC INTO THE FMC; I WAS DISTR MOMENTARILY AND FAILED TO RECOGNIZE THAT HE INPUT DIRECT TO JAMMN AND THEN THE JAMMN4 ARR. AFTER THE JAMMN INTXN BUT PRIOR TO THE NEXT FIX (SPIEK) WE WERE ISSUED THE CLRNC; 'COMPANY NUMBER AFTER SPIEK DSND VIA THE DELTA 2 ARR EXCEPT MAINTAIN 280 KTS.' I READ BACK THE CLRNC AND ALONG WITH THE PF WAS A LITTLE CONFUSED SINCE WE WERE BOTH LOOKING AT THE JAMMN4 ARR AND THERE WERE NO FURTHER DSCNTS. WE DIDN'T QUERY THE CTLR SINCE WE ERRONEOUSLY ASSUMED THAT HE GAVE THAT CLRNC ONLY TO CHANGE THE ARR SPD SINCE WE WERE ALREADY AT 13000 FT. WE WERE UNAWARE THAT BOTH THE JAMMN4 AND THE DELTA2 ARR SHARE BOTH THE JAMMN INTXN AS WELL AS THE SPIEK INTXN. SO EVEN THOUGH I READBACK THE DELTA2 ARR IN OUR CLRNC; WE FAILED TO RECOGNIZE THAT WE HAD THE WRONG ARR LOADED IN THE FMC. SUBSEQUENTLY; WE MISSED THE HEIRY XING RESTR AT 12000 FT. ATC QUERIED US JUST WHEN WE DISCOVERED OUR ERROR AND IMMEDIATELY CORRECTED COURSE AND ALT. ATC THEN ISSUED THE CLRNC; 'COMPANY NUMBER JUST MAINTAIN 11000 FT.' WE COMPLIED WITH THE ALT AS WE FLEW OVER THE MAGNE INTXN. AT THAT POINT WE WERE HANDED OFF TO THE TWR FREQ AND SUBSEQUENTLY CLRED FOR THE VISUAL APCH TO RWY 16R. WE LANDED UNEVENTFULLY AND TO MY KNOWLEDGE THERE WAS NEVER AN ACFT SEPARATION ISSUE INVOLVED. DILIGENT XCHK OF FMC INPUT AS WELL AS DESIGNING ARRS THAT DO NOT SHARE THE SAME WAYPOINTS. I BELIEVE WE WOULD HAVE RECOGNIZED THIS ERROR IMMEDIATELY IF WE WERE NOT CLRED TO A FIX WHICH IS SHARED BY 2 ARRS -- ESPECIALLY SINCE JAMMN IS A COMMON CLRNC AND ARR INTO SLC.