No signal in the basement: how technicians work offline without losing the work order
The installation is in the basement, the boiler room or a plant room under a car park, and there is no signal down there. For a technician with a paper work order, that is not a problem. For a technician with an app that only works online, it is a working day that ends half on paper and half in their memory.
Published by Abdelhay Rahou (opens in a new window)5 November 20265 min read
Where the signal disappears
Anyone who maintains installations often works where the signal is weak or absent: basements, boiler rooms, plant rooms, underground car parks, lift shafts, rural areas. So the problem is nothing unusual. At some customers, it comes back at every visit.
What goes wrong with an online-only app
- The technician goes back to paper. They note the hours and parts on a sheet and type them in again in the evening, or forget.
- The photos arrive later, or never. They stay in the phone’s gallery instead of being attached to the intervention.
- The steps are approximate. Arrival, start and finish are filled in afterwards, from memory.
- The signature is missing. The customer cannot sign while the app is loading, and the technician leaves without it.
- The office is in the dark. As long as nothing comes through, nobody knows whether the intervention is in progress or finished.
What a technician app must do without a connection
If you are comparing software for your technicians, ask these questions about offline working:
- Does the app save every change on the device, and send it in the right order as soon as the connection returns?
- Can the technician see that they are working offline, and what is still waiting to be sent?
- What works offline, and what does not? An honest answer also names what needs a connection.
- Is a change never applied twice, even if it is sent again?
- What happens in a conflict, for example if the office has changed the intervention in the meantime?
- What must the technician do in advance to have the day’s data on the device?
A day in the basement: an example
In the morning, still with a signal, the technician opens the day’s interventions. In the basement of an apartment building there is no signal: an orange bar shows that they are working offline. They record their arrival and the start of the work, add the parts used, take the photos and fill in the report. The property manager signs on the screen, and the report for the customer joins the queue. Back upstairs, the signal returns: the app sends everything in order. Only then does the office see the intervention as finished.
Short video · 0:30
Geen bereik in de kelder?
De app werkt ook zonder netwerk: stappen, foto's en rapport worden op het toestel bewaard en vertrekken naar kantoor zodra er weer bereik is.
Video in Dutch, with Dutch captions
All short videos (in Dutch)How it works in Digitalnatie Service Suite
The mobile app for technicians keeps working without a connection: every change is first saved on the device, then sent in order.
| Works offline, sent later | Needs a connection |
|---|---|
| The steps: departure, arrival, start of work, break, end of work, customer absent | Logging in |
| The report, the photos and the signatures | Starting an LMRA (last-minute risk analysis) or a PPE (personal protective equipment) check |
| Parts added or returned | Opening a document, an enlarged photo or a PDF |
| Answers to LMRAs, PPE checks, documents and checklists | Opening a QR code |
| Parts requests, tasks and the technician’s day | The invoice and payment on site |
| Sending the report to the customer | Saving their profile |
- Visible: without a connection, an orange bar appears, and a screen shown from the device’s copy says that it is not up to date.
- The queue: a sync screen shows what has been synced, what is waiting, what failed and what is in conflict. The app sends by itself after every change, when the connection returns, when the technician comes back to the app and every 30 seconds.
- Never twice: every change has a fixed key, so sending it again never applies it twice.
- Refusal or conflict: if the office has cancelled or changed the intervention in the meantime, the technician decides what happens to their change.
- Preparing: open the day’s interventions in the morning, with a connection. The app then keeps the day’s interventions, the overdue ones and the upcoming ones, the van, the tasks and the week’s calendar.
As long as nothing has been sent, the office sees nothing. And offline, the location of a step is only saved if the step is sent within 30 seconds.
Frequently asked questions
Does the app work completely without a connection?
The work on site does: steps, report, photos, signature, parts and checklists. Logging in, starting an LMRA or a PPE check, opening a QR code, and the invoice and payment on site need a connection.
What does the office see while the technician is offline?
Nothing that is still in the queue. The office sees the changes as soon as the app has sent them, in the order the technician made them.
Can the customer sign without a connection?
Yes. The signature and the report are saved on the device and are sent as soon as the connection returns, including the report for the customer.
What should a technician do before going somewhere without a signal?
Open the app and the day’s interventions at least once with a connection, preferably in the morning. A screen never opened with a connection has no copy on the device.