Basic assumption is that Retail price drives Units because a lower retail price enables more buyers, and Units drive COGS because higher production leads to optimization that lowers costs.

Price-driven Model

Basic assumption is that Retail price drives Units - a lower retail price enables more buyers - and Units drive COGS - higher production lowers costs.

Price-driven Model

A simple model for market sizing and sigmoidal growth over time

Business Forecasting Market Sizing

A simple example using the Rand and RandTriangular functions to explore the Sensitivity Testing function.

Simple customer growth stock and flow model that considers the impact of referrals, conversion rate and market size.

Sales Growth Marketing

Simple customer growth stock and flow model that considers the impact of referrals, conversion rate and market size.

Sales Growth Marketing

One Compartment Single Dose model from "Introduction to Computational Science" by Angela and George Shiftlet

Pharma

A variant that show growth limitation without collapse. Further development may include a collapse and recovery scenario, using delays.

Pasture Growth Limitation Farming

Simple model used to assess the likely outcome of Revenue and Profit due to variability of purchase price, price impact on Units Sold, and Units Sold impact on Unit Cost.

Finance Business

Attempt to model how failure/replacement rates affect gear over time.

​Muskrat model from SDS Summer School 2015.  Suppose there is a muskrat plague in a particular area. At first, there were 100 muskrats. The autonomous increase in the number of muskrats per muskrat per year amounts to an average of 20 muskrats per muskrat per year.

Environment Muskrats

Simple model from WPI SDS Summer School 2015

Drug Consumption

A simple model of how leads progress to close and installation in order to help identify inflection points where demand exceeds resources and creates installation backlog.

Sales Support

Simple model to explore the effect of locally versus globally optimized solutions, contemplating the pros and cons of selecting either a local or global solution path, and weighing the path selection against the likelihood of obtaining a sufficiently optimal solution within the time available to mak

Problem Solving EaBT

Simple model to explore the effect of locally versus globally optimized solutions, contemplating the pros and cons of selecting either a local or global solution path, and weighing the path selection against the likelihood of obtaining a sufficiently optimal solution within the time available to mak

Problem Solving EaBT

A very simple model that resulted from a proposed EaBT situation.

Communications Project Management

A basic model that shows the progress of a lead through several selling stages.  Leads proceed through fixed time periods (conveyors) but with adjustable probability of progress to closure.

Sales Pipeline

"In operation here is what researchers call the "Matthew effect," after the Bible verse found in the Gospel of Matthew: “For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath.” In other words, the academica

Matthew Effect

Revenues and profits based on variable price points.

Pricing Revenue

A simple Matthew Effect model for " the rich get richer" part; future models may consider "the poor get poorer" part.  See http://cup.columbia.edu/book/978-0-231-14948-8/the-matthew-effect/excerpt

Rich Get Richer Matthew Effect

Simple rich picture diagram shown how positive experiences from purchase of dogs at pet shops reinforces puppy mills (profit motive).
Negative experiences can result in abandoned dogs that are either rescued or euthanized.  

Puppy Mill Canine Rescue

Simple rich picture diagram shown how positive experiences from purchase of dogs at pet shops reinforces puppy mills (profit motive).
Negative experiences can result in abandoned dogs that are either rescued or euthanized.  

Puppy Mill Canine Rescue