PNX Mobile App
PNX : 2018

Designing the App

What is it?

PNX stop-and-search mobile application Combining PNC/PND data for Crime, Intelligence, custody, domestic abuse, Child abuse & missing persons.

Who is it for?

All regional Police Forces throughout the UK


Presented to a Chief Constable and other Senior Officers who asked us to start production on the app, working to an  MVP.

Discovery workshops

I had numerous workshops with Constables, Sergeants, Senior Officers and my CGI project team in understanding the wider scope firstly, then determining the realistic outcome of functions we could complete and test for the initial release.

Criteria and various scenarios

OCG (Organised crime group):

  • Incidents, convictions, what were they using, – link the icon to these cases.
  • High, med, and low classification types of activity Status/position role within the OCG – Leader, driver, thief etc.
  • Criminality types, Geographic impact area.

The network diagram highlights the relationship model of the associated group and the amount of transgressions between them. The app needs to be intuitive that highlights the immediate status or threat to the officer regarding the person they’re shadowing or questioning.

PNC / PND challenges

The biggest issue we faced was integrating the legacy software database (PNC) together with the more modern one in PND. This was crucial for me to have a clear idea of the returned search results.

PNC The Police National Computer (PNC)
A computer system used extensively by law enforcement organisations across the United Kingdom. It went live in 1974 and now consists of several databases available 24 hours a day, giving access to information of national and local significance.

PND The Police National Database (PND)
is available to all police forces and wider criminal justice agencies throughout the United Kingdom, allowing the police service to share local information and intelligence on a national basis. The PND supports delivery of three strategic benefits which are to safeguard children and vulnerable people, to counter terrorism, and to prevent and disrupt serious and organised crime.

PNC & PND integration findings
  • PND data and PNC data will be coming from different sources probably delivered via an organisations IT infrastructure. 
  • PNC has limited Location data so just deliver PND data and potentially other sources?
  • Vehicle data from PND and PNC have the Vehicle Registration Number. So it would be possible to display PND and PNC data in the same results set.
  • Each person carries a PNC ID No which can (but not always) appear on the PND record.
  • PND contains details of People, but due to the fact that the data is intelligence based you may not have all of the answers to secure identification 
  • PND does not have fingerprint or DNA reference material.
  • The above means that it will be difficult to render information on a single page that you can truly state relates to the same person. 
Mobile functionality

After understanding the scope and the direction we wanted the search app to work I set about designing out the main types of functionlaity the phone should include.

Search functionality
Menu interaction
Initial screen designs
Final screen designs and functionality
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