The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for ERD skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited ERD over the 3 months to 26 March 2017 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

3 months to
26 Mar 2017
Same period 2016 Same period 2015
Entity-Relationship Diagram (ER Diagram)
London / City of London
Rank 150 155 194
Rank change year-on-year +5 +39  
Contract jobs citing ERD 4 3 1
As % of all contract IT jobs advertised in the City of London 0.13% 0.090% 0.020%
As % of the Processes & Methodologies category 0.16% 0.10% 0.024%
Number of daily rates quoted 2 3 0
Median daily rate £575 £500 -
Median daily rate % change year-on-year +15.00% -  
UK excluding London median daily rate - £455 £425
% change year-on-year - +7.05%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

ERD is in the process and methodology skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in the City of London with a requirement for process and methodology skills.

Contract Process & Methodology Skills
City of London
Contract job vacancies with a requirement for process and methodology skills 2561 2922 4205
As % of all contract IT job vacancies advertised in the City of London 85.54% 87.83% 82.45%
Number of daily rates quoted 2008 2335 3244
Median daily rate £500 £475 £450
Median daily rate % change year-on-year +5.26% +5.55%  
90% offered a daily rate of more than £345 £325 £320
10% offered a daily rate of more than £625 £625 £625
UK excluding London median daily rate £410 £400 £398
% change year-on-year +2.50% +0.62%  
Number of hourly rates quoted 22 27 36
Median hourly rate £16.00 £20.89 £20.45
Median hourly rate % change year-on-year -23.40% +2.17%  
90% offered a hourly rate of more than £13.50 £14.20 £12.50
10% offered a hourly rate of more than £28.35 £47.50 £92.50
UK excluding London median hourly rate £36.00 £38.75 £30.00
% change year-on-year -7.09% +29.16%  

ERD
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London citing ERD as a proportion of all contract or permanent IT jobs with a match in the Processes & Methodologies category.

Job vacancy trend for ERD in the City of London

ERD
Contractor Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing ERD in the City of London.

Contractor daily rate trend for ERD in the City of London

ERD
Top 30 Related IT Skills in the City of London

For the 6 months to 26 March 2017, IT contractor jobs citing ERD also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the City of London region with a requirement for ERD.

1 4 (100.00%) Data Modelling
1 4 (100.00%) Finance
1 4 (100.00%) Banking
2 3 (75.00%) jQuery
2 3 (75.00%) Visualforce
2 3 (75.00%) Apex Code
2 3 (75.00%) Open Source
2 3 (75.00%) NoSQL
2 3 (75.00%) Data Mapping
2 3 (75.00%) Enterprise Software
2 3 (75.00%) DevOps
2 3 (75.00%) SOQL
2 3 (75.00%) SOSL
2 3 (75.00%) XML Parsing
2 3 (75.00%) API Development
2 3 (75.00%) Service Design
2 3 (75.00%) XML Schema
2 3 (75.00%) Middleware
2 3 (75.00%) SOA
2 3 (75.00%) CSS
2 3 (75.00%) Informatica
2 3 (75.00%) Salesforce.com
2 3 (75.00%) MOM
2 3 (75.00%) Java
2 3 (75.00%) Oracle
2 3 (75.00%) XML
2 3 (75.00%) XSLT
2 3 (75.00%) UML
2 3 (75.00%) CRM
2 3 (75.00%) EAI

ERD
Top Related IT Skills in the City of London by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 2 (50.00%) Confluence
1 2 (50.00%) Mule
1 2 (50.00%) Oracle SOA Suite
Cloud Services
1 2 (50.00%) GitHub
Database & Business Intelligence
1 3 (75.00%) NoSQL
2 2 (50.00%) Big Data
2 2 (50.00%) QlikView
2 2 (50.00%) SQL Server
3 1 (25.00%) MarkLogic
3 1 (25.00%) RDBMS
3 1 (25.00%) Relational Database
Development Applications
1 2 (50.00%) Bitbucket
1 2 (50.00%) Eclipse
1 2 (50.00%) Git (software)
1 2 (50.00%) Jenkins
1 2 (50.00%) JIRA
1 2 (50.00%) Oracle APEX
1 2 (50.00%) TeamCity
General
1 4 (100.00%) Banking
1 4 (100.00%) Finance
2 1 (25.00%) Investment Banking
Job Titles
1 3 (75.00%) Architect
1 3 (75.00%) Developer
1 3 (75.00%) Java Architect
1 3 (75.00%) Java Developer
1 3 (75.00%) Lead Architect
1 3 (75.00%) Lead Developer
1 3 (75.00%) Lead Java Developer
1 3 (75.00%) Salesforce Architect
1 3 (75.00%) Salesforce Developer
2 1 (25.00%) Data Modeller
Libraries, Frameworks & Software Standards
1 3 (75.00%) CSS
1 3 (75.00%) jQuery
1 3 (75.00%) Middleware
1 3 (75.00%) Visualforce
1 3 (75.00%) XML
1 3 (75.00%) XML Schema
1 3 (75.00%) XSLT
2 2 (50.00%) AngularJS
2 2 (50.00%) Apache Camel
2 2 (50.00%) GWT
2 2 (50.00%) JSON
2 2 (50.00%) REST
2 2 (50.00%) SOAP
2 2 (50.00%) Struts
Miscellaneous
1 3 (75.00%) Enterprise Software
2 1 (25.00%) Fintech
Processes & Methodologies
1 4 (100.00%) Data Modelling
2 3 (75.00%) API Development
2 3 (75.00%) CRM
2 3 (75.00%) Data Mapping
2 3 (75.00%) DevOps
2 3 (75.00%) EAI
2 3 (75.00%) Open Source
2 3 (75.00%) Service Design
2 3 (75.00%) SOA
2 3 (75.00%) UML
2 3 (75.00%) XML Parsing
3 2 (50.00%) Analytics
4 1 (25.00%) Data Management
Programming Languages
1 3 (75.00%) Apex Code
1 3 (75.00%) Java
1 3 (75.00%) SOQL
1 3 (75.00%) SOSL
2 2 (50.00%) SQL
Systems Management
1 3 (75.00%) MOM
Vendors
1 3 (75.00%) Informatica
1 3 (75.00%) Oracle
1 3 (75.00%) Salesforce.com
2 2 (50.00%) Tableau
2 2 (50.00%) TIBCO
3 1 (25.00%) IBM