Flow solvability
- Last UpdatedFeb 28, 2025
- 2 minute read
Data reconciliation classifies the solvability of each flow, so that you can review the classifications and more fully understand the solvability of your model.
Solvability classification
|
Solvability |
Solvability description |
Color |
Code |
|
Redundant |
|||
|
Redundant |
Normal redundant flow. |
Green |
R |
|
Constant Redundant |
Redundant but constant flow (tolerance = 0). Constant in this table means matching the measured value exactly. Thus, constants are constants for the period in question, but may vary by period. |
Green |
CR |
|
Gross Error |
Redundant but flow is a gross error. |
Purple |
GS |
|
Inferred Constant Redundant |
Redundant but inferred constant flow (tolerance <> 0) due to surrounding flows being constant. |
Green |
CRR |
|
Constant Redundant by Maximum Constraint |
Redundant but inferred constant flow (tolerance <> 0) by maximum constraint. (“Capped”) |
Green |
CCR |
|
Redundant with Linear Constraint |
Redundant flow and it is used as a variable in a linear constraint. This stream is both redundant for material balance, and is an input to a Smart Constraint. See New approach to data reconciliation. |
Green |
RC |
|
Gross Error with Linear Constraint |
Redundant flow, but considered a gross error and it is used as a variable in a linear constraint. |
Purple |
GSC |
|
NonRedundant |
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|
NonRedundant |
Normal NonRedundant flow (tolerance<>0). |
Green |
NR |
|
Constant NonRedundant |
NonRedundant and constant flow (tolerance = 0). |
Green |
CNR |
|
NonRedundant with Linear Constraint |
NonRedundant flow and it is used as a variable in a linear constraint. It becomes a redundant flow if the linear constraint is satisfied. The flow is not redundant for the normal material balance constraint, but is redundant for satisfying a Smart Constraint. |
Green |
NRC |
|
Solvable |
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|
Solvable |
Normal solvable flow. |
Yellow |
S |
|
Inferred Constant Solvable |
Solvable but inferred constant flow by other constant flows. |
Yellow |
CRS |
|
Solvable with Linear Constraint |
Solvable flow and it is used as a variable in a linear constraint. |
Yellow |
SC |
|
NonSolvable |
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|
NonSolvable |
Normal nonsolvable flow. |
Yellow |
NS |
|
NonSolvable with Linear Constraint |
NonSolvable flow and it is used as a variable in a linear constraint. It becomes a solvable flow if the linear constraint is satisfied. |
Yellow |
NSC |
|
Out of Service |
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|
Out of Service |
Out of service flow (measured value = 0) |
Orange |
OS |
|
Inferred Out of Service |
Inferred out of service flow by problematic out of service balance point that has either inflows with no outflows, or outflows with no inflows. |
Orange |
ROS |
|
Out of Service by Minimum Constraint |
Inferred out of service flow by minimum constraint causing flow to be forced to zero. |
Red |
COS |