INT Control app shown on five smartphones: new intervention type selection, Technological Risk first-actions checklist, completed intervention summary, PDF report preview and interventions archive INT Control app shown on two smartphones: the new intervention screen with six intervention types and the Technological Risk first-actions checklist INT Control app shown on a smartphone: the Technological Risk first-actions checklist with numbered actions, info buttons and slide-to-confirm controls

INT Control

Project
Concept prototype
OS
Android · iOS

A mobile app for recording in the field the steps set out in the Standardized Work Instructions (INT) for each firefighting intervention. Users select the intervention type, check off the mandatory actions, access support information and, once finished, generate a summary that can be exported as a PDF. This is a design proposal developed up to the prototype stage, and it has not been released to market.

Fire engine driving along a narrow rural road on its way to an intervention
Firefighters on a technical assistance call: two crew members on top of the fire engine handling a ladder while a third cuts a fallen pine tree with a chainsaw

Problem

In every intervention, incident commanders must follow the steps set out in the corresponding INT for each type of incident: from the first actions to the final handover, including specific procedures such as flash reports or ventilation. Until now, this was tracked through a tool linked to a Telegram channel, which was impractical in the field, or simply with pen and paper. This made it hard to keep a clear overview of what had been done and what was still pending, and to keep a record once the call was over.


Solution

A mobile app that turns each protocol into a guided checklist. Users select one of the six intervention types and check off actions as the call progresses, with direct access to reference sheets whenever in doubt. During the process, the initial split by role (crew commander and incident commander) was dropped, since the same person may end up handling every phase of the call. Once finished, the app generates a report with the action count and basic data, which can be exported as a PDF and consulted later from the archive.

UX RESEARCH

Before starting any visual design work, a short research phase based on surveys and interviews with members of the fire service was carried out to validate the real need for a digital tool. Later, once the first basic prototypes were ready, user tests were conducted to gather feedback and iterate on the solution.

UX research in figures: 26 user surveys, 4 user interviews and 4 user tests

ARCHITECTURE

The information architecture is built around three main sections, accessible from the bottom navigation bar: New, Archive and Profile. New acts as the entry point, where users select one of the six intervention types and follow the corresponding protocol through to the final report. The same report can be consulted again at any time from the Archive.

Information architecture diagram: the splash page, onboarding and login lead to the New section, which is linked to Archive and Profile. From New, users choose one of six intervention types (structural fires, wildland fires, technological risk, rescues, mobility and technical assistance), all leading to the Report, which can also be accessed from Archive. Profile leads to Logout, which returns to Login.

WIREFRAMES

Before moving on to the visual design, mid-fidelity prototypes were built to validate the structure with real users. Testing helped uncover confusing flows, unnecessary steps and unclear interactions, and the solution was iterated to create a more direct and reliable experience in the field.

Mid-fidelity wireframes of three key screens: creating a new intervention by type, the Technological Risk first-actions checklist with toggles, and the completed intervention summary with action totals and basic data

DIGITAL
PRODUCT

INT Control app icon: red rounded square with the white Bombers logo, shown alongside the icon installed on a smartphone home screen

After logging in, users land directly on the screen for creating a new intervention. The six intervention types are laid out in a grid of large cards, each with its own icon, so they can be recognized at a glance and selected with a single tap, even under pressure in the field.

New intervention screen: a grid of six cards with red icons for structural fires, wildland fires, technological risks, rescue, mobility and technical assistance, above a bottom navigation bar with Archive, Home and Profile

ACTIONS

Each protocol is presented as a numbered list of actions, in the order they are carried out. The key component is the slide-to-confirm control: marking an action as completed requires a deliberate swipe, which prevents accidental confirmations. Once completed, the card changes state and color, so users can see at a glance what has been done and what is still pending. Each step also includes an info button to resolve any doubts.

Technological Risk checklist, page 1 of 2: numbered first actions, each with an info button and a slide-to-confirm control; action 3 is marked as completed
Technological Risk checklist, page 2 of 2: final actions such as waste management and handover marked as completed, one action pending, and a Continue button
Structural Fires checklist: actions such as ventilation control, utilities control and 360° size-up, with completed and pending states
CACE sub-procedure within Structural Fires, with a back button to return to the main checklist and a Finish button to close the intervention

Some protocol steps are easier to understand through a diagram than through text. For this reason, the app includes quick-reference infographics, such as area layouts or crew circuits. A simple color code and a clear hierarchy make them readable at a glance, even under pressure.

CACE layout infographic: below the hot zone, a control point with a board manager splits two areas. In the red dirty area, crews leaving the hot zone drop empty cylinders and go to the recovery area; in the navy clean area, full cylinders and available crews move up towards the control point. The warm zone is shown at the bottom.

REPORT

Once the intervention is finished, the app generates a report with the count of completed and pending actions, broken down by phase. It also includes the basic call data (location, date, start and end times), and the report can be sent as a PDF and is stored in the archive.

Intervention completed screen: two large counters showing completed and not completed actions, a breakdown by phase (first actions and PAI), and the intervention type and reference code
Report details: basic data with a Google Maps location link, date, start and end times, a link to the intervention summary, and Send PDF and Close buttons

The report can also be exported as a PDF to be shared or filed outside the app. The document brings together the intervention details and the full list of actions, showing the status of each one in a clean, easy-to-review format.

PDF preview of the intervention record on a mobile screen: a header with type, record number, date, location and start and end times, followed by a numbered list of actions, each marked with a check if completed or a red cross if not

ARCHIVE
& PROFILE

From the Archive, users can consult past interventions, grouped by date and identified by type and code, with search and filters. The Profile brings together the basic settings: assigned fire station, permissions and log out.

Interventions archive screen: past interventions grouped by date, each showing its type icon, name, reference code and time, with a search bar and filter button
User profile screen: settings with the assigned fire station and email, a geolocation permission option, the app version and a Log out button

UI GUIDELINES

Color palette of the app: red #E40B0B, navy blue #040A4F, dark grey #373737 and white #FFFFFF
Eonik typeface specimen in three weights (Regular, Medium and Bold), with full alphabet, numerals and symbols
4-column mobile layout grid with 16 px gutters and 16 px margins, shown empty and applied to the Technological Risk first-actions checklist