Vensim PLE INTEG UNABLE TO UNDERSTAND RIGHT HAND SIDE OF EQUATION

[archerkeith]

Hi i'm using the model PLE and I ran into a problem and i can't seem to solve it. I'm creating a diagram as seen in the attachment below. I have inputed all the equations except the sales force since there is always an error popping out and i don't know the reason why. Please help me on this and your help will be greatly appreciated. This is a model on Sales Force

(01) cash flow = orders booked * price of item
Units: dollars/Month
(02) FINAL TIME = 60
Units: Month
The final time for the simulation.
(03) indicated sales force = sales budget / sales person salary
Units: person
(04) INITIAL TIME = 0
Units: Month
The initial time for the simulation.
(05) net hires = (indicated sales force - Sales Force) / sales force adjustment time
Units: person/Month
(06) orders booked = Sales Force * sales force productivity
Units: unit/Month
(07) price of item= 430
Units: dollars/unit
(08) revenue to sales=200
Units: dollars/unit
(09) sales budget = orders booked * revenue to sales
Units: dollars/Month
(10) Sales Force = x
Units: person
(11) sales force adjustment time=6
Units: Month
(12) sales force productivity= 210
Units: unit/(person*Month)
(13) sales person salary = 2000
Units: dollars/(person*Month)
(14) SAVEPER = TIME STEP
Units: Month
The frequency with which output is stored.
(15) TIME STEP = 0.25
Units: Month
The time step for the simulation.

[LAUJJL]

Hi

the level is missing an intial value and does not need an integ twice.

See the model corrected with some small added variables and some graphs to be used with the synthesim.

Regards.

JJ

[LAUJJL]

Hi

A bug in the previous model, where I do not take into account the inertia of the stock of salesman.

Corrected with this model joined.

Regards.

JJ