The Applications Handbook.pdf - Nexus Technologies Inc.

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PLAN: Building the Right Applications in the Right Way ■ 23 impacts on cost and resource availability. It can also help planners: • Revisit proposals that are not in the current planning period but are still relevant for the business within the next planning period. • Identify proposals that cross fiscal reporting periods. Summary: Application as Asset An application is a business asset. It merits the same comprehensive financial treatment (ROI, depreciation, etc.) as other assets. Portfolio management and optimization is the critical discipline in proper IT financial management, where enterprises achieve complete visibility into the delivery and support costs of the application, from proposal through retirement. Only by gaining the necessary transparency of costs can IT hope to control them, calculate value, and direct spending for maximum innovation and business value. The ‘Other’ Enterprise Planning: Architecture and Policy Governance We’ve made the case that too few enterprises recognize the huge change that modernization means for their application teams. Perhaps nowhere is this more evident than in application architecture. Gone are the days of brittle, standalone applications. Increasingly, the application results from an orchestration of pre-existing components and services. This is next-generation architecture and it’s redefining the way applications are designed, built, and delivered. However, adopting these new architectural strategies doesn’t just happen by embracing buzzwords like “service-oriented architecture” (SOA) or “composite applications.” Getting the maximum
24 ■ The Applications Handbook effect from these strategies requires an important change in the way that companies plan, direct, control, and measure their enterprise architecture. IT’s Industrial Revolution In essence, service-based architectures allow you to build applications the way modern manufacturers produce goods. Very few commercial products are handcrafted custom items. Instead, most are built from prefab components on an assembly line. Application delivery can happen the same way in the age of reusable services: Use reliable parts to assemble applications (rather than build from scratch). The benefits are the same— more consistency, better quality, and a much greater ability to scale. It’s an elegant strategy, but requires real investment to become reality. Adopting a services-oriented approach brings challenges: • Organizational behavior • Cross-team collaboration and information sharing • Consistent processes and policies that drive compliance and guide decision-making • Modern application architectures mean more moving parts These changes run counter to the way IT has delivered applications, systems, and solutions over the past 40 years.
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