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EdgeUsageJourney

A long-running usage of edge hardware that triggers a set of EdgeFunctions for the whole time the device is in service.

When to use this class

Use EdgeUsageJourney for hardware that runs continuously, like a sensor that captures data every minute or an industrial controller. Use UsageJourney for user-driven, request-style interactions in a web context. See web_vs_edge.

Params

name

A human readable description of the object.

edge_functions

EdgeFunctions active during the journey, each describing what runs on devices and what is sent to servers.

A list of EdgeFunctions.

usage_span

How long one edge device is in use, from deployment to retirement. The fabrication footprint is amortised over this duration.

Unit: year.

Calculated attributes

nb_edge_usage_journeys_in_parallel_per_edge_usage_pattern

Hourly count of edge usage journeys that are concurrently active in each pattern, derived from the journey-start timeseries and the journey usage span.

Example value: {
EdgeUsagePattern Default edge usage pattern (7d23cf): 105192 values from 2025-01-01 00:00:00+00:00 to 2037-01-01 00:00:00+00:00 in M:
first 10 vals [0, 0, 0, 0, 0, 0, 0, 0.000999, 0.002, 0.003],
last 10 vals [0.005, 0.005, 0.005, 0.005, 0.005, 0.004, 0.003, 0.002, 0.000997, 0],
}

Depends directly on:

through the following calculations:

You can also visit the link to Hourly nb of edge usage journeys in parallel’s full calculation graph.

fabrication_impact_repartition_weights

Per-EdgeUsagePattern weight used to attribute downstream fabrication-phase emissions back to each pattern, proportional to concurrent edge journeys.

Example value: {
EdgeUsagePattern Default edge usage pattern (7d23cf): 105192 values from 2025-01-01 00:00:00+00:00 to 2037-01-01 00:00:00+00:00 in M:
first 10 vals [0, 0, 0, 0, 0, 0, 0, 0.000999, 0.002, 0.003],
last 10 vals [0.005, 0.005, 0.005, 0.005, 0.005, 0.004, 0.003, 0.002, 0.000997, 0],
}

Depends directly on:

through the following calculations:

You can also visit the link to Default edge usage pattern fabrication weight in impact repartition’s full calculation graph.

fabrication_impact_repartition_weight_sum

Sum of fabrication impact repartition weights, used as the denominator when normalising into per-container shares.

Example value: 105192 values from 2025-01-01 00:00:00+00:00 to 2037-01-01 00:00:00+00:00 in M:
first 10 vals [0, 0, 0, 0, 0, 0, 0, 0.000999, 0.002, 0.003],
last 10 vals [0.005, 0.005, 0.005, 0.005, 0.005, 0.004, 0.003, 0.002, 0.000997, 0]

Depends directly on:

through the following calculations:

You can also visit the link to Fabrication impact repartition weights sum’s full calculation graph.

fabrication_impact_repartition

Normalised share of fabrication-phase emissions that this object attributes to each container.

Example value: {
EdgeUsagePattern Default edge usage pattern (7d23cf): 105192 values from 2025-01-01 00:00:00+00:00 to 2037-01-01 00:00:00+00:00 in :
first 10 vals [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
last 10 vals [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
}

Depends directly on:

through the following calculations:

You can also visit the link to fabrication impact attribution to Default edge usage pattern’s full calculation graph.

usage_impact_repartition_weights

Per-EdgeUsagePattern weight used to attribute downstream usage-phase emissions, scaled by the country's grid carbon intensity so high-carbon grids draw a larger share.

Example value: {
EdgeUsagePattern Default edge usage pattern (7d23cf): 105192 values from 2025-01-01 00:00:00+00:00 to 2037-01-01 00:00:00+00:00 in ·g/kWh:
first 10 vals [0, 0, 0, 0, 0, 0, 0, 84900, 170000, 255000],
last 10 vals [425000, 425000, 425000, 425000, 425000, 340000, 255000, 170000, 84700, 0],
}

Depends directly on:

through the following calculations:

You can also visit the link to Default edge usage pattern usage weight in impact repartition’s full calculation graph.

usage_impact_repartition_weight_sum

Sum of usage impact repartition weights, used as the denominator when normalising into per-container shares.

Example value: 105192 values from 2025-01-01 00:00:00+00:00 to 2037-01-01 00:00:00+00:00 in ·g/kWh:
first 10 vals [0, 0, 0, 0, 0, 0, 0, 84900, 170000, 255000],
last 10 vals [425000, 425000, 425000, 425000, 425000, 340000, 255000, 170000, 84700, 0]

Depends directly on:

through the following calculations:

You can also visit the link to Usage impact repartition weights sum’s full calculation graph.

usage_impact_repartition

Normalised share of usage-phase emissions that this object attributes to each container.

Example value: {
EdgeUsagePattern Default edge usage pattern (7d23cf): 105192 values from 2025-01-01 00:00:00+00:00 to 2037-01-01 00:00:00+00:00 in :
first 10 vals [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
last 10 vals [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
}

Depends directly on:

through the following calculations:

You can also visit the link to usage impact attribution to Default edge usage pattern’s full calculation graph.