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There are over 1700 web )6(servi)3.7(ces )6(avai)3.7(l)3.7(a)2(bl)3.7(e, )]TJ 0.00031 Tw T*[(and )-6(t)3.6(h)-1.8(ese )-6(servi)3.6(ces )-6(are )-6(grouped i)3.6(n)-1.8( at)3.6( l)3.6(east)3.6( t)3.6(w)-1.2(o hi)3.6(erarchi)3.6(e)1.9(s:)3.6( one )]TJ 0.18581 Tw T*[(by)4.3( l)3.7(i)3.7(censed process com)12.6(ponent)3.7( \(Ent)3.7(erpri)3.7(s)1.2(e R)3.6(e)2(source Pl)3.7(an-)]TJ -0.00999 Tc 0.2271 Tw T*[(ni)4.4(ng, )-6(C)4.3(u)-1(st)4.4(om)13.3(er )-6(R)4.3(e)2.7(l)4.4(a)2.7(t)4.4(i)4.4(onshi)4.4(p M)4.9(a)2.7(nagem)13.3(e)2.7(nt)4.4(, and m)13.3(o)-1(re\) and )]TJ -0.0107 Tc 0.1978 Tw T*[(t)3.7(h)-1.7(e ot)3.7(her by)4.3( l)3.7(i)3.7(k)-1.7(el)3.7(y)4.3( scenari)3.7(o)-1.7( )6(of )6(use. )6(R)3.6(e)2(l)3.7(a)2(t)3.7(i)3.7(onshi)3.7(ps )6(bet)3.7(w)-1.1(een )]TJ -0.0121 Tc 0.14529 Tw T*[(service operations com)11.2(p)-3.1(licate th)]TJ -0.01151 Tc 0.1447 Tw 12.9581 0 Td [(eir use, and are )6(not )5.9(always )]TJ -0.01131 Tc 0.31219 Tw -12.9581 -1.1677 Td [(clear. 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Myers, Jeffrey Stylos, )Tj -0.0106 Tc 0.00279 Tw 19.085 0 Td (Sae Young \(Sophie\) Jeong, Yingyu \(Clare\) Xie )Tj -0.0118 Tc -0.00259 Tw 10.02 0 0 10.02 224.88 671.34 Tm (Human Computer Interaction Institute )Tj -0.0116 Tc -0.00279 Tw 2.2754 -1.1497 Td (Carnegie Mellon University )Tj -0.0123 Tc -0.00211 Tw 1.2156 -1.1497 Td (Pittsburgh, PA 15213 )Tj -0.011 Tc 0 Tw 1.5569 -1.1497 Td (412-268-8277 )Tj -0.01019 Tc 12 0 0 12 248.94 619.38 Tm (jackbeaton@cmu.edu )Tj 0 Tc 4.755 -1.4 Td ( )Tj /TT8 1 Tf -0.01199 Tc -21 -1.425 Td (ABSTRACT)Tj /TT2 1 Tf 0 Tc 10.02 0 0 10.02 118.2 585.48 Tm ( )Tj -0.0112 Tc 0.0786 Tw -6.4072 -1.1976 Td (SAP recently began offering acce)Tj -0.01089 Tc 0.07829 Tw 13.3892 0 Td [(ss to web services )6(through )]TJ -0.01199 Tc 0.2171 Tw -13.3892 -1.1677 Td [(its En)-3(terp)-3(rise )6(Serv)-3(ice-Orien)-3(t)]TJ -0.0114 Tc 0.21049 Tw 11.5269 0 Td (ed Architecture \(E-SOA\) plat-)Tj -0.01221 Tc 0.0676 Tw -11.5269 -1.1677 Td [(fo)-3.2(rm)11.1(. 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To)-3.5( facilitate su)-3.5(ch)-3.5( a )6(ch)-3.5(an)-3.5(g)-3.5(e)0.2(, )6(Carn)-3.5(eg)-3.5(ie )6(Mello)-3.5(n)-3.5( )6(Un)-3.5(iv)-3.5(er-)]TJ -0.0123 Tc 0.05569 Tw T*[(sity\222s )-6(Hu)-3.3(m)11(a)0.4(n)-3.3(-)-2.6(Co)-3.3(m)11(p)-3.3(u)-3.3(t)2.1(er In)-3.3(teractio)-3.3(n)-3.3( In)-3.3(stitu)-3.3(te is wo)-3.3(rk)-3.3(in)-3.3(g)-3.3( with)-3.3( )]TJ -0.01089 Tc 0.1741 Tw T*[(SAP\222s E-SOA and B)3.4(u)-1.9(si)3.5(ness Process )6(R)3.4(e)1.8(novat)3.5(i)3.5(on )6(Team)12.4(s )6(t)3.5(o)-1.9( )]TJ -0.0119 Tc 0.0793 Tw T*(analyze the E-SOA interfaces )Tj -0.0112 Tc 0.0786 Tw 12.0778 0 Td (using HCI tec)Tj -0.0106 Tc 0.078 Tw 5.5629 0 Td [(hniques and )6(de-)]TJ -0.0108 Tc 0.0782 Tw -17.6407 -1.1677 Td [(t)3.6(e)1.9(rm)12.5(i)3.6(n)-1.8(e )-6(m)12.5(eans by)4.2( whi)3.6(c)1.9(h devel)3.6(opers assi)3.6(gned t)3.6(o)-1.8( creat)3.6(e SOA )]TJ -0.0112 Tc 0.0666 Tw T*[(APIs )-6(in general, and Enterprise SOA APIs in particular, can )]TJ -0.0114 Tc 0.0069 Tw T*[(design superior interfaces. The )6(id)]TJ 0.00079 Tw 12.994 0 Td (entification of usable design )Tj -0.0106 Tc 0.078 Tw -12.994 -1.1677 Td [(pat)3.8(t)3.8(e)2.1(rns, and m)12.7(e)2.1(t)3.8(hodol)3.8(ogi)3.8(es t)3.8(o)-1.6( det)3.8(e)2.1(rm)12.7(i)3.8(n)-1.6(e t)3.8(h)-1.6(ese pat)3.8(t)3.8(e)2.1(rns, )6(can )]TJ 0.1738 Tw T*[(st)3.8(ream)12.7(l)3.8(i)3.8(n)-1.6(e )-6(SOA )-6(project)3.8(s for API devel)3.8(opers and program)12.7(-)]TJ -0.01041 Tc -0.00011 Tw T*[(m)12.9(e)2.3(rs who use SOA APIs. )]TJ /TT8 1 Tf -0.0096 Tc -0.0004 Tw 12 0 0 12 54 372.24 Tm (Categories and Subject Descriptors)Tj /TT2 1 Tf 0 Tc 0 Tw 10.02 0 0 10.02 231.06 372.24 Tm ( )Tj -0.01199 Tc 0.1871 Tw -17.6707 -1.1976 Td [(C2)-3(.4)-3(. 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There are over 1700 web )6(servi)3.7(ces )6(avai)3.7(l)3.7(a)2(bl)3.7(e, )]TJ 0.00031 Tw T*[(and )-6(t)3.6(h)-1.8(ese )-6(servi)3.6(ces )-6(are )-6(grouped i)3.6(n)-1.8( at)3.6( l)3.6(east)3.6( t)3.6(w)-1.2(o hi)3.6(erarchi)3.6(e)1.9(s:)3.6( one )]TJ 0.18581 Tw T*[(by)4.3( l)3.7(i)3.7(censed process com)12.6(ponent)3.7( \(Ent)3.7(erpri)3.7(s)1.2(e R)3.6(e)2(source Pl)3.7(an-)]TJ -0.00999 Tc 0.2271 Tw T*[(ni)4.4(ng, )-6(C)4.3(u)-1(st)4.4(om)13.3(er )-6(R)4.3(e)2.7(l)4.4(a)2.7(t)4.4(i)4.4(onshi)4.4(p M)4.9(a)2.7(nagem)13.3(e)2.7(nt)4.4(, and m)13.3(o)-1(re\) and )]TJ -0.0107 Tc 0.1978 Tw T*[(t)3.7(h)-1.7(e ot)3.7(her by)4.3( l)3.7(i)3.7(k)-1.7(el)3.7(y)4.3( scenari)3.7(o)-1.7( )6(of )6(use. )6(R)3.6(e)2(l)3.7(a)2(t)3.7(i)3.7(onshi)3.7(ps )6(bet)3.7(w)-1.1(een )]TJ -0.0121 Tc 0.14529 Tw T*[(service operations com)11.2(p)-3.1(licate th)]TJ -0.01151 Tc 0.1447 Tw 12.9581 0 Td [(eir use, and are )6(not )5.9(always )]TJ -0.01131 Tc 0.31219 Tw -12.9581 -1.1677 Td [(clear. 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To)-3.5( facilitate su)-3.5(ch)-3.5( a )6(ch)-3.5(an)-3.5(g)-3.5(e)0.2(, )6(Carn)-3.5(eg)-3.5(ie )6(Mello)-3.5(n)-3.5( )6(Un)-3.5(iv)-3.5(er-)]TJ -0.0123 Tc 0.05569 Tw T*[(sity\222s )-6(Hu)-3.3(m)11(a)0.4(n)-3.3(-)-2.6(Co)-3.3(m)11(p)-3.3(u)-3.3(t)2.1(er In)-3.3(teractio)-3.3(n)-3.3( In)-3.3(stitu)-3.3(te is wo)-3.3(rk)-3.3(in)-3.3(g)-3.3( with)-3.3( )]TJ -0.01089 Tc 0.1741 Tw T*[(SAP\222s E-SOA and B)3.4(u)-1.9(si)3.5(ness Process )6(R)3.4(e)1.8(novat)3.5(i)3.5(on )6(Team)12.4(s )6(t)3.5(o)-1.9( )]TJ -0.0119 Tc 0.0793 Tw T*(analyze the E-SOA interfaces )Tj -0.0112 Tc 0.0786 Tw 12.0778 0 Td (using HCI tec)Tj -0.0106 Tc 0.078 Tw 5.5629 0 Td [(hniques and )6(de-)]TJ -0.0108 Tc 0.0782 Tw -17.6407 -1.1677 Td [(t)3.6(e)1.9(rm)12.5(i)3.6(n)-1.8(e )-6(m)12.5(eans by)4.2( whi)3.6(c)1.9(h devel)3.6(opers assi)3.6(gned t)3.6(o)-1.8( creat)3.6(e SOA )]TJ -0.0112 Tc 0.0666 Tw T*[(APIs )-6(in general, and Enterprise SOA APIs in particular, can )]TJ -0.0114 Tc 0.0069 Tw T*[(design superior interfaces. The )6(id)]TJ 0.00079 Tw 12.994 0 Td (entification of usable design )Tj -0.0106 Tc 0.078 Tw -12.994 -1.1677 Td [(pat)3.8(t)3.8(e)2.1(rns, and m)12.7(e)2.1(t)3.8(hodol)3.8(ogi)3.8(es t)3.8(o)-1.6( det)3.8(e)2.1(rm)12.7(i)3.8(n)-1.6(e t)3.8(h)-1.6(ese pat)3.8(t)3.8(e)2.1(rns, )6(can )]TJ 0.1738 Tw T*[(st)3.8(ream)12.7(l)3.8(i)3.8(n)-1.6(e )-6(SOA )-6(project)3.8(s for API devel)3.8(opers and program)12.7(-)]TJ -0.01041 Tc -0.00011 Tw T*[(m)12.9(e)2.3(rs who use SOA APIs. )]TJ /TT8 1 Tf -0.0096 Tc -0.0004 Tw 12 0 0 12 54 372.24 Tm (Categories and Subject Descriptors)Tj /TT2 1 Tf 0 Tc 0 Tw 10.02 0 0 10.02 231.06 372.24 Tm ( )Tj -0.01199 Tc 0.1871 Tw -17.6707 -1.1976 Td [(C2)-3(.4)-3(. 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There are over 1700 web )6(servi)3.7(ces )6(avai)3.7(l)3.7(a)2(bl)3.7(e, )]TJ 0.00031 Tw T*[(and )-6(t)3.6(h)-1.8(ese )-6(servi)3.6(ces )-6(are )-6(grouped i)3.6(n)-1.8( at)3.6( l)3.6(east)3.6( t)3.6(w)-1.2(o hi)3.6(erarchi)3.6(e)1.9(s:)3.6( one )]TJ 0.18581 Tw T*[(by)4.3( l)3.7(i)3.7(censed process com)12.6(ponent)3.7( \(Ent)3.7(erpri)3.7(s)1.2(e R)3.6(e)2(source Pl)3.7(an-)]TJ -0.00999 Tc 0.2271 Tw T*[(ni)4.4(ng, )-6(C)4.3(u)-1(st)4.4(om)13.3(er )-6(R)4.3(e)2.7(l)4.4(a)2.7(t)4.4(i)4.4(onshi)4.4(p M)4.9(a)2.7(nagem)13.3(e)2.7(nt)4.4(, and m)13.3(o)-1(re\) and )]TJ -0.0107 Tc 0.1978 Tw T*[(t)3.7(h)-1.7(e ot)3.7(her by)4.3( l)3.7(i)3.7(k)-1.7(el)3.7(y)4.3( scenari)3.7(o)-1.7( )6(of )6(use. )6(R)3.6(e)2(l)3.7(a)2(t)3.7(i)3.7(onshi)3.7(ps )6(bet)3.7(w)-1.1(een )]TJ -0.0121 Tc 0.14529 Tw T*[(service operations com)11.2(p)-3.1(licate th)]TJ -0.01151 Tc 0.1447 Tw 12.9581 0 Td [(eir use, and are )6(not )5.9(always )]TJ -0.01131 Tc 0.31219 Tw -12.9581 -1.1677 Td [(clear. 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The )6(id)]TJ 0.00079 Tw 12.994 0 Td (entification of usable design )Tj -0.0106 Tc 0.078 Tw -12.994 -1.1677 Td [(pat)3.8(t)3.8(e)2.1(rns, and m)12.7(e)2.1(t)3.8(hodol)3.8(ogi)3.8(es t)3.8(o)-1.6( det)3.8(e)2.1(rm)12.7(i)3.8(n)-1.6(e t)3.8(h)-1.6(ese pat)3.8(t)3.8(e)2.1(rns, )6(can )]TJ 0.1738 Tw T*[(st)3.8(ream)12.7(l)3.8(i)3.8(n)-1.6(e )-6(SOA )-6(project)3.8(s for API devel)3.8(opers and program)12.7(-)]TJ -0.01041 Tc -0.00011 Tw T*[(m)12.9(e)2.3(rs who use SOA APIs. )]TJ /TT8 1 Tf -0.0096 Tc -0.0004 Tw 12 0 0 12 54 372.24 Tm (Categories and Subject Descriptors)Tj /TT2 1 Tf 0 Tc 0 Tw 10.02 0 0 10.02 231.06 372.24 Tm ( )Tj -0.01199 Tc 0.1871 Tw -17.6707 -1.1976 Td [(C2)-3(.4)-3(. 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There are over 1700 web )6(servi)3.7(ces )6(avai)3.7(l)3.7(a)2(bl)3.7(e, )]TJ 0.00031 Tw T*[(and )-6(t)3.6(h)-1.8(ese )-6(servi)3.6(ces )-6(are )-6(grouped i)3.6(n)-1.8( at)3.6( l)3.6(east)3.6( t)3.6(w)-1.2(o hi)3.6(erarchi)3.6(e)1.9(s:)3.6( one )]TJ 0.18581 Tw T*[(by)4.3( l)3.7(i)3.7(censed process com)12.6(ponent)3.7( \(Ent)3.7(erpri)3.7(s)1.2(e R)3.6(e)2(source Pl)3.7(an-)]TJ -0.00999 Tc 0.2271 Tw T*[(ni)4.4(ng, )-6(C)4.3(u)-1(st)4.4(om)13.3(er )-6(R)4.3(e)2.7(l)4.4(a)2.7(t)4.4(i)4.4(onshi)4.4(p M)4.9(a)2.7(nagem)13.3(e)2.7(nt)4.4(, and m)13.3(o)-1(re\) and )]TJ -0.0107 Tc 0.1978 Tw T*[(t)3.7(h)-1.7(e ot)3.7(her by)4.3( l)3.7(i)3.7(k)-1.7(el)3.7(y)4.3( scenari)3.7(o)-1.7( )6(of )6(use. )6(R)3.6(e)2(l)3.7(a)2(t)3.7(i)3.7(onshi)3.7(ps )6(bet)3.7(w)-1.1(een )]TJ -0.0121 Tc 0.14529 Tw T*[(service operations com)11.2(p)-3.1(licate th)]TJ -0.01151 Tc 0.1447 Tw 12.9581 0 Td [(eir use, and are )6(not )5.9(always )]TJ -0.01131 Tc 0.31219 Tw -12.9581 -1.1677 Td [(clear. 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The )6(id)]TJ 0.00079 Tw 12.994 0 Td (entification of usable design )Tj -0.0106 Tc 0.078 Tw -12.994 -1.1677 Td [(pat)3.8(t)3.8(e)2.1(rns, and m)12.7(e)2.1(t)3.8(hodol)3.8(ogi)3.8(es t)3.8(o)-1.6( det)3.8(e)2.1(rm)12.7(i)3.8(n)-1.6(e t)3.8(h)-1.6(ese pat)3.8(t)3.8(e)2.1(rns, )6(can )]TJ 0.1738 Tw T*[(st)3.8(ream)12.7(l)3.8(i)3.8(n)-1.6(e )-6(SOA )-6(project)3.8(s for API devel)3.8(opers and program)12.7(-)]TJ -0.01041 Tc -0.00011 Tw T*[(m)12.9(e)2.3(rs who use SOA APIs. )]TJ /TT8 1 Tf -0.0096 Tc -0.0004 Tw 12 0 0 12 54 372.24 Tm (Categories and Subject Descriptors)Tj /TT2 1 Tf 0 Tc 0 Tw 10.02 0 0 10.02 231.06 372.24 Tm ( )Tj -0.01199 Tc 0.1871 Tw -17.6707 -1.1976 Td [(C2)-3(.4)-3(. 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There are over 1700 web )6(servi)3.7(ces )6(avai)3.7(l)3.7(a)2(bl)3.7(e, )]TJ 0.00031 Tw T*[(and )-6(t)3.6(h)-1.8(ese )-6(servi)3.6(ces )-6(are )-6(grouped i)3.6(n)-1.8( at)3.6( l)3.6(east)3.6( t)3.6(w)-1.2(o hi)3.6(erarchi)3.6(e)1.9(s:)3.6( one )]TJ 0.18581 Tw T*[(by)4.3( l)3.7(i)3.7(censed process com)12.6(ponent)3.7( \(Ent)3.7(erpri)3.7(s)1.2(e R)3.6(e)2(source Pl)3.7(an-)]TJ -0.00999 Tc 0.2271 Tw T*[(ni)4.4(ng, )-6(C)4.3(u)-1(st)4.4(om)13.3(er )-6(R)4.3(e)2.7(l)4.4(a)2.7(t)4.4(i)4.4(onshi)4.4(p M)4.9(a)2.7(nagem)13.3(e)2.7(nt)4.4(, and m)13.3(o)-1(re\) and )]TJ -0.0107 Tc 0.1978 Tw T*[(t)3.7(h)-1.7(e ot)3.7(her by)4.3( l)3.7(i)3.7(k)-1.7(el)3.7(y)4.3( scenari)3.7(o)-1.7( )6(of )6(use. )6(R)3.6(e)2(l)3.7(a)2(t)3.7(i)3.7(onshi)3.7(ps )6(bet)3.7(w)-1.1(een )]TJ -0.0121 Tc 0.14529 Tw T*[(service operations com)11.2(p)-3.1(licate th)]TJ -0.01151 Tc 0.1447 Tw 12.9581 0 Td [(eir use, and are )6(not )5.9(always )]TJ -0.01131 Tc 0.31219 Tw -12.9581 -1.1677 Td [(clear. 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The )6(id)]TJ 0.00079 Tw 12.994 0 Td (entification of usable design )Tj -0.0106 Tc 0.078 Tw -12.994 -1.1677 Td [(pat)3.8(t)3.8(e)2.1(rns, and m)12.7(e)2.1(t)3.8(hodol)3.8(ogi)3.8(es t)3.8(o)-1.6( det)3.8(e)2.1(rm)12.7(i)3.8(n)-1.6(e t)3.8(h)-1.6(ese pat)3.8(t)3.8(e)2.1(rns, )6(can )]TJ 0.1738 Tw T*[(st)3.8(ream)12.7(l)3.8(i)3.8(n)-1.6(e )-6(SOA )-6(project)3.8(s for API devel)3.8(opers and program)12.7(-)]TJ -0.01041 Tc -0.00011 Tw T*[(m)12.9(e)2.3(rs who use SOA APIs. )]TJ /TT8 1 Tf -0.0096 Tc -0.0004 Tw 12 0 0 12 54 372.24 Tm (Categories and Subject Descriptors)Tj /TT2 1 Tf 0 Tc 0 Tw 10.02 0 0 10.02 231.06 372.24 Tm ( )Tj -0.01199 Tc 0.1871 Tw -17.6707 -1.1976 Td [(C2)-3(.4)-3(. 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There are over 1700 web )6(servi)3.7(ces )6(avai)3.7(l)3.7(a)2(bl)3.7(e, )]TJ 0.00031 Tw T*[(and )-6(t)3.6(h)-1.8(ese )-6(servi)3.6(ces )-6(are )-6(grouped i)3.6(n)-1.8( at)3.6( l)3.6(east)3.6( t)3.6(w)-1.2(o hi)3.6(erarchi)3.6(e)1.9(s:)3.6( one )]TJ 0.18581 Tw T*[(by)4.3( l)3.7(i)3.7(censed process com)12.6(ponent)3.7( \(Ent)3.7(erpri)3.7(s)1.2(e R)3.6(e)2(source Pl)3.7(an-)]TJ -0.00999 Tc 0.2271 Tw T*[(ni)4.4(ng, )-6(C)4.3(u)-1(st)4.4(om)13.3(er )-6(R)4.3(e)2.7(l)4.4(a)2.7(t)4.4(i)4.4(onshi)4.4(p M)4.9(a)2.7(nagem)13.3(e)2.7(nt)4.4(, and m)13.3(o)-1(re\) and )]TJ -0.0107 Tc 0.1978 Tw T*[(t)3.7(h)-1.7(e ot)3.7(her by)4.3( l)3.7(i)3.7(k)-1.7(el)3.7(y)4.3( scenari)3.7(o)-1.7( )6(of )6(use. )6(R)3.6(e)2(l)3.7(a)2(t)3.7(i)3.7(onshi)3.7(ps )6(bet)3.7(w)-1.1(een )]TJ -0.0121 Tc 0.14529 Tw T*[(service operations com)11.2(p)-3.1(licate th)]TJ -0.01151 Tc 0.1447 Tw 12.9581 0 Td [(eir use, and are )6(not )5.9(always )]TJ -0.01131 Tc 0.31219 Tw -12.9581 -1.1677 Td [(clear. 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