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NREL / BioproductTransitionDynamics

A system dynamics decision support tool for bioproduct industry stakeholders who want to investigate how their decisions can impact the process of bioproducts gaining U.S. market share.
https://bioenergymodels.nrel.gov/models/14/
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make sure vensim version is consistent #52

Closed rjhanes closed 4 years ago

rjhanes commented 4 years ago

Rebecca's version: DSS 7.3.5

Please add a comment with your Vensim version.

TonyBologna95 commented 4 years ago

Anthony's version: DSS 8.0.4

bwbush commented 4 years ago

Brian's version: DSS 7.3.5 for Windows.

Lauren-Sittler commented 4 years ago

Lauren's Version: DSS 8.0.4

rjhanes commented 4 years ago

I downloaded DSS 8.0.4 x64 and re-ran the BTD to compare the results. I found small numerical differences in some parameters and for some time steps. The most consistent (showing up across the majority of time steps) differences between results from the two model versions I found were in BS balance and BS imbalance, but these differences were on the order of 10^-10 for BS imbalance and up to 1000 for BS balance. The 8.0.4 version actually had BS balance under 10^-7 for most of the model run. My interpretation is that the 8.0.4 version resolves some of the rounding errors that the 7.3.5 version had.

Since differences between the two versions are unlikely to impact analysis results, let's leave everyone's software the way it is until the next license renewal and update everyone to the latest version at that time.

rjhanes commented 4 years ago

Brian's and my licenses are being renewed this month and we'll update to the latest version when that happens.