- v3.1.0 (2023-12-03)
Server schedules now defined with objects.
Slotted services feature added, with capacitated and non-capacitated slots, and pre-emption options.
Rename ‘continue’ pre-emption option to ‘resume’.
Allows simultaneous renegeing customers.
- v3.0.2 (2023-11-14)
Fix bug where simulation errors if fist event of a node is a shift change.
Minor docstring and documentation changes.
Default statetracker is now None.
- v3.0.1 (2023-10-31)
Fix bug where class change individual not reset after preemption.
- v3.0.0 (2023-08-22)
Adds service disciplines - FIFO, LIFO, SIRO and ability for custom disciplines.
Removes baulking and rejection dictionaries, these are recorded as DataRecords.
Adds an optional filter to Q.get_all_records to filter only records of given types.
Removes ciw.dists.NoArrivals, can just use None.
Removes ability to write to file and read from file.
Allows any string to represent customer classes.
Api changes to class_change_matrices and class_change_distributions
ciw.trackers.NodeClassMatrix now required a class_ordering keyword to ordet the arbitrary customer class string names.
- v2.3.7 (2023-04-06)
Adds Poisson, Geometric, and Binomial distributions for batching.
- v2.3.6 (2023-02-16)
Writes a data record for interrupted services caused by server schedules.
Raises an error when an inconsistant number of custom node classes are used.
- v2.3.5 (2023-02-07)
Fixes bug caused when implementing preemptive priority classes and server schedules that take all servers off duty.
- v2.3.4 (2022-12-07)
PoissonIntervals distribution now allows rates of zero
- v2.3.2 (2022-10-07)
Add PoissonIntervals distribution
Add numpy random generator, ciw.seed now also creates new random generator
Documentation on parallelising trials
Remove support for Python 3.6
- v2.3.1 (2022-07-25)
Fixes bug where blocked customers were candidates for finish_service when more than one customer finishes service simultaneously
Correctly writes csv’s in Windows
Support for Python 3.9 by updating tqdm requirement
- v2.3.0 (2022-05-10)
Reneging customers implemented
Customer class changes while waiting implemented
Preemptive interruption options implemented
New record_type field added to DataRecords
- v2.2.4 (2022-03-02)
Improve docs on pausing simulations and server priorities
Record server ID in the DataRecords
Move CI to GitHub Actions
- v2.2.3 (2022-01-27)
Server priority functions implemented.
- v2.2.2 (2021-12-17)
State trackers now take objects not indices
Servers are attached to individuals before sampling service times
Docs on sever-dependant distributions
Docs on DES+SD hybrid simulations
- v2.2.1 (2021-11-04)
PhaseType distributions implemented
Classes for specific PhaseType distributions: Erlang, HyperExponential, HyperErlang, and Coxian
- v2.2.0 (2021-07-22)
Processor sharing implemented (limited and capacitated)
Ability to use a different node_class per node of the network
State tracking now works with simulate_until_max_customers
Remove testing on Python 3.5
- v2.1.3 (2020-10-06)
Small refactor to Node adding new servers, and to Individuals receiving the Simulation object.
Add a library of custom behaviour to docs
Support Python 3.8, update hypothesis
- v2.1.2 (2020-09-26)
Ability to incorporate customer behaviour Server and Individual classes.
- v2.1.1 (2020-05-27)
State Trackers slightly more efficent, they do not record any state changes that result in the same state as before.
Add the NodePopulationSubset tracker.
Distribution objects can now see the Simulation object, for true state dependent distributions.
- v2.1.0 (2020-04-23)
State Trackers now track history
State Trackers give state probabilities
A number of performance improvements
Fix some documentation
Test on PyPy3.6 and Python 3.7 too
- v2.0.1 (2019-07-17)
setup.py now finds packages to fix pip install bug
- v2.0.0 (2019-07-10)
Drop support for Python 2.7, Python 3.4.
Update networkx and pyyaml requirements.
Refactor time so that Simulation has current_time attribute.
Change Transition_matrices keyword to routing.
routing can take a process-based routing function.
Refactor distributions to be objects: [‘Exponential’, 0.5] -> ciw.dists.Exponential(0.5).
Distribution objects can be manipulated with +, -, * and /.
All keywords lower case to conform to Pep8.
deadlock_detector keyword takes object, not string.
tracker keyword takes object, not string.
Add tests and docs to show how objects can be used for state-dependent distributions.
All user facing api now takes float(‘inf’) not ‘Inf’, expect for .yml files.
Reference Ciw paper in docs.
Add AUTHORS.rst to docs.
- v1.1.6 (2018-10-22)
Fixed bug in which preemptively iterrupted individuals remained blocked once service resampled.
Fixed bug in which interrupted individuals not removed from interrupted list when restarting service.
Some performance improvements.
Improve deadlock detection to check for knots less often.
- v1.1.5 (2018-01-11)
Fixed bug calculating the utilisation of servers.
- v1.1.4 (2017-12-12)
Time dependent batching distributions
Hard pin requirements versions
- v1.1.3 (2017-08-18)
Replace DataRecord object with namedtuple.
Number of minor tweaks for speed improvements.
- v1.1.2 (2017-07-05)
- v1.1.1 (2017-06-23)
Server utilisation & overtime.
Small fixes to docs.
Testing on Python 3.6.
- v1.1.0 (2017-04-26)
Replace kwargs with actual keyword arguments in ciw.create_network.
Refactor server schedule inputs (schedules placed inside Number_of_servers instead of as their own keyword).
- v1.0.0 (2017-04-04)
ciw.create_network takes in kwargs, not dictionary.
Add Sequential distribution.
Add truncated Normal distribution.
Refactor inputs for custom PDF.
Refactor inputs for server schedules.
Transition matrix now optional for 1 node networks.
Overhaul of documentation.
Slight improvement of ciw.random_choice.
- v0.2.11 (2017-03-13)
Add ability to simulate until max number of customers have passed arrived/been accepted/passed through the system.
- v0.2.10 (2017-03-10)
Drop dependency on numpy.
- v0.2.9 (2017-02-24)
Allow zero servers.
- v0.2.8 (2016-11-10)
Add option for time dependent distributions.
- v0.2.7 (2016-10-26)
Run tests on Appveyor.
Check docs build and pip installable on Travis.
Remove hypothesis cache.
- v0.2.6 (2016-10-17)
Add progress bar option.
- v0.2.5 (2016-10-06)
Fix bug that didn’t include .rst files in MANIFEST.in.
- v0.2.4 (2016-09-27)
Fixed bug in which priority classes and dynamic classes didn’t work together.
New feature: preemptive interruptions for server schedules.
- v0.2.3 (2016-07-27)
Ability to set seed. More docs. Fixes to tests.
- v0.2.2 (2016-07-06)
Baulking implemented, and minor fixes to order of unblocking.
- v0.2.1 (2016-06-29)
Priority classes implemented.
- v0.2.0 (2016-06-20)
Python 3.4 and 3.5 compatible along with 2.7.
Data records now kept in list.
- v0.1.1 (2016-06-06)
Ability to incorporate behaviour nodes.
Data records are now named tuples.
- v0.1.0 (2016-04-25)
Simulation takes in a Network object.
Helper functions to import yml and dictionary to a Network object.
Simulation object takes optional arguments: deadlock_detector, exact, tracker.
simulate_until_max_time() takes argument max_simulation_time.
- v0.0.6 (2016-04-04)
Restructure some features e.g. times_to_deadlock.
Custom simulation names.
- v0.0.5 (2016-03-18)
State space tracker plug-and-playable.
Add rejection dictionary.
- v0.0.4 (2016-02-20)
Empirical and UserDefined distributions added.
- v0.0.3 (2016-02-09)
MMC options removed.
Fix server schedule bugs.
- v0.0.2 (2016-01-06)
Some kwargs optional.
- v0.0.1 (2015-12-14)
- v0.0.1dev (2015-12-14)
Initial release (dev).