fragment - uo-lca/uo-lca.github.io GitHub Wiki

A life cycle inventory fragment is a piece of a life cycle inventory model. A fragment can be described as a set of nodes connected by links without any loops. Each node in a fragment is either a process, a sub-fragment, or an input or output flow that is exchanged with the external world. A fragment has an implicit "system boundary" defined by the nodes it contains. Input or output flows cross the system boundary.

A Fragment showing the top level of the Used Oil Management LCI model. Green nodes are sub-fragments, blue nodes are process instances, and orange nodes are inputs and outputs.

This view displays fragment nodes and edges with a sankey diagram. Hover over a node to see a tool-tip displaying the node type and name.

Activity Level is initialized to the activity level defined in the current scenario and is multiplied by node weight during fragment navigation.

A Process node represents a unit process transforming input flows into output flows within the system boundary. Click on a process node to navigate to the Process Instance view.

A Sub-Fragment node represents another fragment within the current fragment. Click on a sub-fragment node to navigate to an expanded view of the sub-fragment.

After navigating to a sub-fragment, the previous fragment will be added to Fragment breadcrumbs. You can navigate back to a prior state by clicking on one of the breadcrumbs. This will restore the activity level for that fragment navigation state.

Fragment Breadcrumbs:

An InputOutput node represents an input or output flow exchanged with the external world.

Sankey diagram links represent flows within the system. Hover over a link to see the flow name and its magnitude. Flow direction is from left to right. Flows with positive magnitude are tan colored, while negative flows are colored grey.