Performance Engineering helps to manage system performance, meet your customer expectations, improve user satisfaction, reduce costs and succeed so that you can focus on your business.

1. Whitepapers
PERFORMANCE
ENGINEERING
On the web, you have less than 27
seconds to display, communicate and
capture the attention of your customer
before they go elsewhere (Nielson, 2006).
Subtract from this the time required to
read and understand your content and it
is clear that your solution must perform
well so as to tap into the business
potential of nearly one billion online
users on the net today.
Solving performance issues by adding
faster or additional hardware is costly,
difficult to manage and unless your
solution is designed to scale, it rarely
solves the problem.
Engineering, Not Performance Tuning
Tuning is an afterthought; Performance
Engineering is planned. It begins with your
business goals, your customer needs and extends
throughout the development and support
lifecycle. The cornerstone for success involves
carefully defined Service Level Agreements (SLAs)
and effective management strategies such as
DMAIC and Failure Modes and Effects Analysis
(FMEA) to set measurable performance objectives
and identify issues before they occur:
Concept Phase:
Practice: Critical business processes are identified
based on revenue values, cost savings or other
business values.
Benefit: Engineering efforts are prioritized and
focused on scenarios that will reduce risk
(financial transactions) and increase revenues
(check out process).
Analysis Phase:
Practice: Ensure that that all non-functional
requirements have been captured and are defined
in measurable and quantifiable terms.
Benefit: Anticipated system load and performance
characteristics can be modeled early to identify
and reduce implementation risks and costs.

2. Design Phase:
Practice: Create and validate test strategy and plan
for critical performance scenarios and generate
appropriate volume of test data (use “10x
Engineering”).
Benefit: The testing phase is too late to detect
critical performance issues. To reduce risk, a
performance test plan must be in place at least
mid-way through design.
WhitepapersPERFORMANCE ENGINEERING
Development Phase:
Practice: Employ “10x Engineering” to insulate the
system against unanticipated spikes or steady
increases in production usage or data volumes.
Profile all critical scenarios for memory, processors
and other resource utilization.
Benefit: Good engineers design for peak usage
not average usage. Further, as business increases
so do the demands on a system. By engineering
for sudden spikes (IPO traffic for example) and
increased usage over time, we are engineering
reliability and increased life expectancy into your
systems.
Testing Phase:
Practice: Exercise performance tests using
real-world data volumes and bandwidth
conditions.
Benefit: Increased confidence validated by load
and stress testing based on SLAs defined early in
the process.
Testing Phase:
Practice: “Synthetic Transactions” to monitor
system health from an end user’s perspective.
Benefit: Ability to detect and respond to
performance issues before your end users.
Ability to respond to a range of issues outside
of your system boundary (network latency for
example).
Increase business revenue and reduce risk by
ensuring the system can process transactions
and meet specified service levels.
Reduce risks in software initiatives by detecting
unacceptable performance early on when you
can do something about it (prior to testing
and release to your customers).
Stay in control of software budgets by eliminating
schedule slippage, avoiding system rework or
tuning efforts due to performance issues.
Avoid additional and unnecessary hardware
acquisition costs.
Reduce operational overheads, increased
maintenance costs and lost revenues due to
poor performance in production.
By taking a proactive approach to
Performance Engineering throughout
the lifecycle, your business will realize
a number of benefits:
Winning the Race – Preparation and
Training Pay Off

3. Your Partner in Success
The Digital Group can help you manage system performance, meet your customer
expectations, improve user satisfaction, reduce costs and succeed so that you can focus on
our business. Let us help you plan and realize your performance objectives.
WhitepapersPERFORMANCE ENGINEERING
THE DIGITAL GROUP INC.
121 Village Boulevard
Princeton Forrestal Village
Princeton NJ 08540 USA
Phone: +1.609.524.2441
Fax: +1.609.228.4844
Email: info@thedigitalgroup.com
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The Digital Group (T/DG) is a trusted Information Technology partner for businesses
across the globe. Our comprehensive IT services include a full spectrum of Product
Engineering and Development services, Software and Data solutions as well as
Enterprise Information Management solutions that help organizations optimize
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