The Start tolerance, End tolerance and Geographical tolerance are used by Frotcom to establish the Automatic route detection.
This is a rather technical set of parameters.
Attention: Because these parameters have direct impact in the way Frotcom detects automatically when a leg's execution starts and ends, you should not change these parameters unless you know exactly the corresponding effect. Otherwise, Frotcom may start to fail detection of step start or step end.
Please ask your Frotcom Certified Partner to guide you through this process in case you really want to change the default parameters.
If you want more information on each of the following parameters, you can click on the information icon:
The first set of parameters instructs Frotcom about when to detect the start of a route.
Suppose you have assigned a route to a vehicle V. The route requires the vehicle to go from place P1 to place P2. During the assignment, you stated that the route is to be started at 08:00.
So, one of the requirements for the detection of this route's execution is that Frotcom must detect that vehicle V is leaving from place P1. That's the first condition. The second condition is that it must leave at 08:00 (because you stated so).
This set of parameters deals with the question "How earlier or later than planned is it acceptable for Frotcom to detect the route's execution?"
Let's suppose our answer is: "Must start no earlier than 30 minutes before the planned departure and no later than 1 hour after the planned departure."
So, with this choice of parameters, if Frotcom detects that this vehicle starts a trip in place P1 5 minutes after the planned time, this trip will be seen as a good candidate to the route's execution. But if it started 2 hours later than planned, the trip would not be considered as a candidate for this route's execution.
It is very important that you keep a set of values which are not too tolerant - because Frotcom will "think" that the route's execution began when in fact that was another unrelated trip; nor too strict, because Frotcom will not consider trips that are started a little earlier of a little later than planned.
The default Start tolerance options are depicted in the following sub-panel:
It contains the following information:
|Before start time||To automatically check if a route step has started, Frotcom will consider trips started no sooner than this interval before the route step's Planned start time. Avoid entering values too high (00:30 is suggested) otherwise the number of false detections of route step starts will increase.|
|After start time||To automatically check if a route step has started, Frotcom will consider trips started no later than this interval after the route step’s Planned start time. Avoid entering values too high (01:00 is suggested) otherwise the number of false detections of route step starts will increase.|
These two parameters tell Frotcom till when it shall keep waiting for a route to be executed once it is started.
Frotcom will keep tracking a route step already started, to register and report when it ends. However, some route steps may be initiated and never ended (abandoned steps). In these cases, Frotcom needs to know for how long it will wait for the vehicle to terminate the step, after the planned end time.
As a time limit after the step's planned end time, it uses the sum of two times:
- a fixed time interval
- a percentage of the estimated trip time
Avoid entering values too high (00:30 for the fixed time interval and 10% for the percentage of estimated trip time are suggested), otherwise the number of false detections of step ends will increase.
The End tolerance options are depicted in the following sub-panel:
Both parameters of the End tolerance sub-panel (Fixed time interval and Variable percentage estimated trip time) will tell Frotcom till when it shall keep waiting for a route to be executed, once it is started.
The tolerance in detecting the start and end of a route's execution must not only be given in terms of time. The geographical tolerance is also important.
In the same example given above, vehicle V must go from place P1 to place P2. But what if the vehicle leaves from a location very near to P1, but not exactly inside it? Should this trip not be considered for the route's execution? Similarly, what if the vehicle arrives to a location very near to P2, but not exactly inside it?
The Geographic tolerance has the following sub-panel:
Field Start and end of trips must be has the following options:
- Near the start and end places
Frotcom will use this tolerance to accept trips which do not really fall inside the place.
Note that with this option, an extra field becomes visible (Maximum distance from place center).
- Inside the start and end places
Frotcom will only consider as valid trips started and ended inside the planned places' geographical limits (circles or polygon's, depending on the place).
Note that in case of steps starting or terminating in addresses or locations selected from the map, hence without a Place as reference, the area considered will be a 100 meters radius circle around the location entered by you. This radius will be overridden by the tolerance value you enter if you select option Near the start and end places, as described above.
The default option is Near the start and end places, with a maximum distance (in a straight line) of 500 m. If you change this, have in mind that there are at least two circumstances which sometimes make it impossible to have a position inside the start and end place:
- Especially for light vehicles and urban areas, sometimes vehicles cannot be parked close enough to the actual place. Drivers will park nearby and walk to the place;
- Sometimes vehicles will leave a building or garage without GPS coverage. Hence, the first positions you get after leaving the building or garage will still not have valid GPS; similarly when a vehicle arrives to a place and immediately parks inside the building or garage. The last valid GPS position may have been acquired outside of the place's perimeter.
For those reasons, it is recommended that the Near the start and end places option is used.