The STEM newsletter is a quarterly bulletin designed to keep you informed of the latest developments in STEM: interesting applications, the latest features and a series of how-does-it-work articles, together with news of forthcoming events.

Using a partition to ease discovery of a model

A collection is a neat way to group elements and provide systematic aggregation across all results available for those elements, and can be nested to form an element hierarchy. We are working on a new partition concept which checks a hierarchy for completeness and uniqueness, and enables a top-down results navigation where you can expand and drill-down into individual branches.

Exploring cost-breakdown results in conjunction with template replication

The interface for drawing graphs has been streamlined in STEM 7.5 with dimensional selection as the norm, and more specific Linear Selection of individual combinations when required. We consider the complexities of notation, selection and spareseness, and show that STEM is the go-to application for handling cost allocation and controlling organisational spending at scale.

The IT value-chain in a data centre

We have created a framework for modelling the IT value-chain in a web-scale enterprise which extrapolates conventional revenue and cost modelling from the hardware/site to value-added IaaS, PaaS and SaaS layers. This structure can then be used to compare buy/build scenarios for delivering services on either third-party or in-house platform / infrastructure / physical data centres.

STEM version 7.5a release

STEM 7.5 is finally ready! Or, more precisely, STEM 7.5 has been available to a small group of early adopters since July 2016, and now a STEM 7.5a point release is available as a recommended update for all users. So what does that mean for you? These release notes explain the evolution (including a list of 27 specific refinements), and offer installation instructions and guidance on compatibility.

Tracing drivers with smart results in the Editor

Suppose it were easier to connect results with what you can see in the Editor, or that STEM could anticipate which results would be of most immediate interest. Soon you will be able to display results from the context menu for a selection of elements in the Editor. A new Trace command will draw the most pertinent graphs to explain the calculation flow for a series of elements.

STEM User Group Meeting 2016 proceedings

Our 21st customer event was held on 05–06 October at King’s College, Cambridge, UK. New and regular users alike engaged in animated debate on two dominant themes of network virtualisation, as well as further game-changing developments in the STEM platform. The full proceedings of the 2016 event are now available for download. Next year’s event will run 27–28 September 2017.

A menu of operational tasks around SDN and NFV

It is always easier to model the costs of physical infrastructure than to estimate the effort involved in tasks relating to service provisioning and operation. Our generic methodology for the calculation structure, from tasks and hours per period to headcount and payroll, allows you to focus on the data requirements and analysis which is where the real learning and insights lie.

An imagined conversation on planning for a web-scale enterprise

A fictional conversation between three of the most influential cloud business leaders at Liverpool Street station in London, UK: Jeff, Mark and Larry compare improvised techniques for forecasting and costing data-centre roll-outs … then realise that the fast train to Cambridge departs from platform 6.

STEM User Group Meeting 2016
05–06 October, King’s College, Cambridge, UK

Our 21st business-modelling event featured a reference framework for modelling the IT value-chain in a web-scale enterprise, as well as a menu of operational tasks around SDN/NFV written on a matrix of skillsets and pay grades.

View the proceedings

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