Andrew Johnston: Professional Consulting Services

Case Study - Yodel Delivery Network Limited (June 2015 – February 2017)


Enterprise Architecture for a major core systems replacement project

Key Outcomes

Delivery of a comprehensive set of reference architectures for the new solution

Key Challenges

Dysfunctional internal team structures, multiple changes of technical and supply direction.

Key Technologies

Oracle SOA Suite, Microsoft stack, Linux and various open source technologies including OpenLDAP


Yodel, a UK parcel delivery company, was created out of the merger of two disparate companies, and has an IT estate characterised by significant duplication and fragmentation, relying on core systems using ageing legacy technologies. The company decided to replace these with a streamlined and consolidated solution based on more modern approaches.

I was engaged to support a small existing Enterprise Architecture team by documenting and guiding the architecture of the new core system and its integration. When the original package-based approach was abandoned in favour of an internal Oracle-based development, I helped create a strong service- and event-based architecture capable of managing Yodel’s significant business volumes in real time. I documented these in a set of comprehensive reference architectures, encompassing all layers of the solution and extending from top-level principles to key design patterns and standards.

One particular challenge was to ensure that the solution met high business expectations in terms of performance and reliability, in a highly cost-constrained physical environment. I led the definition of a comprehensive set of non-functional requirements, and guided an inexperienced team to develop models establishing the suitability of the proposed designs.

In addition, I designed an identity management solution for external users (using OpenLDAP), conducted an independent review of a problematic billing system, and supported the development of Yodel’s first customer mobile application.


© Questa Computing Ltd. 2014
Page last updated 10 March, 2017 11:33

Questa Computing Ltd. is registered in England and Wales number:2889117.
Registered office: Ember House, 35-37 Creek Road, East Molesey, KT8 9BE UK
For credits, copyright details and cookie policy, see here.

Search my Sites:

Share this page:

Share |


Favourite/Major Articles
All Articles by Category
All Articles by Title
Review Index

Site Map:

Welcome / Home Page
Contact Me
Search the Site
Thoughts on the World
Consultancy Services
An introduction
Key Skills
Career Summary
Case Studies
IT Knowledge/Education
Customer Profiles
Training Courses
Previous Experience
Download Full CV
National Grid Group Plc
British Energy Power and Energy Trading
Legal Marketing Services Ltd.
Marks and Spencer Plc
Faith Footwear Ltd.
Barclays Sales Financing Ltd.
Oracle Corporation UK Ltd.
Livingston Rental Group Ltd.
National Power Plc.
Agile Development
Coding Projects & Thoughts
General Thoughts
Products and Projects
Reviews: Books, Music & Films
Website Announcements
Full Index
Publications and Papers
A Hacker's Guide to Project Management
Conference Papers
Agile Architecture
Practical Enterprise Integration
Modelling an Enterprise Data Architecture
Strategies for Flexibility
Getting Sizing Right
Muzzling the Alligators
Evolution of a Test Method
Photography Articles & Discussion
Photo Gallery
Projects and Products
RelQuest - Reliability Modelling Tool
ConQuest - Container Yard Management System
Full Index
Biography and Personal Endeavour
Construction & Civil Engineering
Human-Computer Interaction
Mathematics & Statistics
Military & 20th Century History
Modelling & Analysis
Photography & Photographers
Physics & Cosmology
Project & People Management
Psychology & Human Behaviour
Science, General

Contact Me

Email me

Feeds and Tweets

Follow me on Twitter


Thoughts on the World
(main feed)

Feedburner XML
RSS Version XML (direct)

How many subscribers?

Other Feeds

Professional Blog
Photo Blog
Photo Album
Review Pages

About my feeds

Google Blog Search

References to
References to

Sister Sites: