Change History

 

Version

Model

Description

2.1

QtsCommon.xla

Fixed worksheet protection error when running in Excel XP

Mva.xls

Fixed computational error in calculating Lq for each node

M_Ek_1.xls

For k>25, removed old Wq(t) plot data from PlotData worksheet

M_M_1_balk.xls

Corrected error in calculating pmf and CDF for number of customers and removed an erroneous balking function definition.

G_M_1.xls

Added version of H/M/1 model with general mixed exponentials for inter-arrival time.

G_M_c.xls

Added version of H/M/c model with general mixed exponentials for inter-arrival time.

G_G_c_bounds.xls

Corrected computational error in calculating Wq lower bound.

2.0

SingleNodeSim.xls

New simulation model added to the package.

Jackson.xls

Changed default value in routing matrix from "?" to 0.

Buzen.xls

Changed default value in routing matrix from "?" to 0.

Jackson_2Classes.xls

Changed default value in routing matrix from "?" to 0.

Mva.xls

Changed default value in routing matrix from "?" to 0.

QtsPlus.xls

Modified index build to eliminate duplicate entries; this allows same model to appear in multiple sections.

G_G_1Sim.xls

Changed default behaviour from "Enter" key to "Tab" key when specifying inter-arrival or service time distributions.

G_G_cSim.xls

Changed default behaviour from "Enter" key to "Tab" key when specifying inter-arrival or service time distributions.

1.0d

 

M_M_cSeries.xls

Fixed numeric overflow error when c > 170

M_M_c.xls

Fixed numeric overflow error when c > 170

1.0c

M_Ek_1.xls

Eliminated restriction on k<=25 for M/E(k)/1 model.  Wq(t) chart not produced if k>25.

G_M_1.xls

Added computations for arrival-time steady-state probabilities and arrival-time L and Lq, converted to iterative root finding algorithm (no longer dependent on Excel Solver)

G_M_c.xls

Fixed error in computing Wq(t), added computations for arrival-time steady-state probabilities and arrival time L and Lq, converted to iterative root finding (no longer dependent on Excel Solver); added check to ensure K>=c to prevent out of range subscript error

QtsCommon.xla

Added iterative root finding procedure in support of the changes in the G/M/1 and G/M/c models

1.0b

M_M_c.xls

Fixed: M/M/c not displaying updated size probabilities when parameter 'c' is changed.

1.0a

Buzen.xls

Fixed:  Buzen not reporting performance measures for Node 4 of queueing networks of 4 or more nodes.

1.0

 

Initial release of the software.

 

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