Cloud Computing has been described as a technological change brought about by the convergence of a number of new and existing technologies.
The promise of Cloud Computing is primarily the following key technical characteristics (see Above the Clouds ):
But this is only half the story. These technical characteristics can also be found in non-disruptive technology solutions. The rate of change and magnitude of cost reduction and specific technical performance impact of Cloud Computing are not just incremental, but can give a five to ten times order of magnitude improvement.
The famous graph used by Amazon Web Services illustrating the capacity versus utilization curve has become an icon in Cloud Computing. The model illustrates the central idea around Cloud-based services enabled through an on-demand business provisioning model to meet actual usage.
The Capacity versus Utilization Curve
Why this matters to business is that one of the core precepts of Cloud Computing is to avoid the cost impact of over-provisioning and under-provisioning. This is in addition to the opportunity for cost, revenue, and margin advantages of business services enabled by rapid deployment of Cloud services with low entry cost, and the potential to enter and exploit new markets.
We contend that in years from now, when Cloud Computing is seen in a historical context, the capacity versus utilization curve will be seen as an iconic model that had the same effect as previous well known business models.
Iconic Business Models
Examples of these include:
But what does this potential icon mean for business? Matching capacity and actual utilization on demand improves operational efficiency, but is that all there is to it? Capacity and utilization are Key Performance Indicators (KPIs). They measure how much or how little something is being used. But is this aligned and being used to generate Return on Investment (ROI)?
The positioning of Cloud Computing, while initially seen as a disruptive technology influence on both buyer and seller prospects, is now evolving into a trade-off between low-cost arbitrage and added value Quality of Service (QoS).
Race to the Bottom
The terms “race to the bottom” or similarly the “prisoner’s dilemma” refer to the competing drive between participants in a market driven by the need to make the greatest cost savings. The term is often seen in a negative context, as the lower costs and margins are seen as a detriment to the participants. Massively scalable services from Cloud Computing providers have the effect of driving down costs and prices, as the dynamics of competition are shifted by the presence of potentially rapid cost reductions and huge data center investments.
The counter-balance to this is the Quality of Service (QoS), and the associated Cost of that Service (CoS) that characterizes the value of the cost per unit of performance provisioned (see the discussion on the Financial Value Perspective of Moving from CAPEX to OPEX and Pay-as-you-go).
The differentiator of Cloud Computing is not just the utility infrastructure computing services, but includes all the higher-level services that enhance and build business service value. We see this as the influence and scope of the movement from IT-centric to business-centric services across a wider services continuum, with utility services for infrastructure at one end, and with business-centric software and business processes delivered as a service from the Cloud at the other.
In addition, the need to provide adequate security should be considered. People are willing to pay a little more for a service if they are assured that there will be good security measures in placed.
This issue is highlighted in this White Paper as it has a direct bearing on the Cloud Computing ROI debate and how it is measured:
The discussion of the market dynamics of Cloud Computing is not developed further in this White Paper, but is a recommended area of research going forward as more products and services become Cloud-enabled.
The iconic capacity versus utilization curve of Figure 1 provides a yardstick of current thinking in Cloud Computing provisioning. It is shown here for increasing demand, but the same model can be applied to both growth and decline of capacity demand in a periodic pattern typical of many businesses.
The following table shows some of the characteristics of traditional IT compared to Cloud-Computing.
Understanding the characteristics of Cloud Computing can be assisted by observations from other industries that are in the process of transformation. Lessons from alternative power sources such as solar energy and wind power contain examples of issues that resonate with familiarity in the Cloud Computing context.
When comparing Cloud Computing to solar and wind energy there are similar adoption issues:
Solar Energy and Wind Power
Just taking a look at the solar energy and wind power characteristics:
Examining the issues of effective wind power or solar energy compared to contemporary energy sources draws parallels with the challenges we also see in defining new technology adoption.
Sellers of resources and services characteristically focus on their operation and technical development, and how they can enable effective business models for existing and potential new customers and markets.
Buyers are typically not concerned about how the sources of energy, resources, or services were generated and delivered. They seek to understand whether their businesses can be supported by the products or services, and whether these can be reliable and cost-effective. Buyers want to know the choices on offer and how they may be able to enhance or swap resources and services for improved business performance.
The following table shows some of the concerns of buyers and sellers of new technology.
In Cloud Computing the common themes in engaging sellers and buyers in the new technology provisioning model includes three key questions:
There are many definitions and viewpoints provided by the sellers of what is now termed “Cloud Computing”. Much of the vocabulary used is defined from the perspective of IT performance and capacity, and the impact of cost savings of asset ownership and variable seller service costs. Yet all these have direct cost-benefit impact on the business consumers of the end services and how they compete and deliver products and services in their industry.
Many business IT departments have addressed emerging trends through actions to drive cost reduction and leverage IT service providers’ adoption of Cloud style services. Many industry organizations and leading IT suppliers of software, hardware, and services, seeking to address their customer needs, have vigorously evaluated and followed a Cloud-style strategy. The challenges and issues are in the transition from the current traditional IT to the new potential capabilities of Cloud Computing. They must be expressed in a language that business end users can understand, and relate to investment, cost improvements, or business performance.
Closer to home in understanding the issues of Cloud Computing, we can draw upon the University of California, Berkeley RAD Lab. White Paper Above the Clouds . This highly informative paper identifies the technical issues for Cloud adoption, and its potential for business benefits and technical challenges. The paper also sheds light on the value that these technical scenarios can provide to business:
This interpretation of the Above the Clouds White Paper in a business-issue context illustrates some interesting aspects of Cloud Computing potential.
The decoupling of resources and provisioning (what can be termed “back end”) from the “front end” business use through intermediation follows much the same argument as Why Buy the Cow  from Ivar Subrah on how on-demand powers the economy and The Big Switch  by Nicolas Carr that takes the analogy even further with distributed industrial IT services.
The business of IT becomes that of leveraging the products and services through competing platforms and channels to defend, attack, and build customers and market share (see the discussion on the Importance of a Business Perspective of the Cloud).
However, a secondary issue from this, described as a “race to the bottom” by many industry observers, arises where commodity charging lowers the cost, removing margin benefits. The counter-balance to this is the Cost of Service (CoS) and Quality of Service (QoS) charges and added value on top of the products and services. We explore this in the next section.
Even after the passing of time from the date of publication of Above the Clouds , the technical challenges are still evident, but they are becoming less so with the evolution Cloud services and technology.
The Above the Clouds paper famously asserts that Private Cloud is not Cloud Computing (Page1) as it is not open to the general public, which is part of the original definition. This illustrates that definitions of Cloud are still evolving, and perhaps the definition commonly assumed in the marketplace today does not necessarily require openness, though it still retains the central concepts of elastic capacity and provisioning.