IETF protocols, 105 Miniscenarios (MS), 6, 7, 117-122, 125, Incumbent operators, market, 6, 106 127-129, 132, 136, 140 Incumbent telecom operators, 76, 110 Model for evolution of a vertical software Independent software vendor (ISV), 11, industry, 25-33 97-100 Modularity, 6, 93-96, 119, 140 Industry Modularity index, 95 focus, telecommunications, 41 lifecycle theory, 21, 22, 70, 71 shakeout stage, 21, 22, 74 In-house software development, 26, 65, 76, Network 78, 80, 135, 139 effects, 18, 19 Innovation externalities, 1, 19 diffusion theory, 5, 17-19, 22 Next Generation OSS (NGOSS) initiative, phase, 25, 27-32 36, 37, 94, 131 radar, 49, 50 Niche strategy, 22, 39, 40, 74 Integration scenarios, 94, 95 Interconnectivity, 94, 96 Interface implementation, efforts needed, Open source software, 29, 120, 121, 131-132 Interface, variations, 104, 105 Internal to external software spending ratio, Operations process area, 37, 95 76-78 Operations Support System (OSS), 1-7, 22, International Telecommunication Union 36-42, 45, 51, 55, 61, 65, 67-88, 93-97, (ITU), 4, 35, 36, 125 101, 103-106, 117-123, 125-135, 140-143 IP multimedia subsystem (IMS), 69, 142 Organizational change, 5, 47-48 OSS/BSS components, 36 OSS/BSS market Key performance indicators (KPI), 51, 53 growth, 39 Knowledge transfer, 29 number of companies, 40 segments, 38 service volume, 38-39 software product segments, 40 Layer strategy, 40 volume, 38-39 Life cycle, companies, 20 OSS market segmentation, 38 Long term evolution (LTE), 69, 143 OSS through Java (OSS/J) initiative, 94-96, Outsource, in-house software development, 26, 65, 67, 69, 70, 140 Market concentration, 6, 74, 75, 101 entry barrier, 106 scope strategies, 39-42 Pleiotropy, 94 Maturity phase of the industry, 21 Pre-integrated products, 83, 93 Maximum number of ISVs, 97-100 Primary software industry, 5, 11-13, 20, 27, Mergers and acquisitions (M&A), 81-88, 32, 33, 85 Productivity increase, Micro ecology, 4, 26, 27, 30, 84, 85 ICT, 47 Index Productization and standardization phase, 59, 61, 68, 69, 78-81