- 3.2.4 (2024-12-04)
- Adds a new method for the simulate_until_max_customers: "Complete" simulates until a specific number of completed customer journeys; while "Finish" simulates until a specific number of customers have reached the exit node (through bailking or reneging).
- 3.2.3 (2024-10-15)
- Allow some numerical imprecision in the PMF probability sums. This allows for very large arrays of probabilities and use of Pandas and Numpy to define probabilities.
- 3.2.2 (2024-07-05)
- Allow custom exit node classes.
- 3.2.1 (2024-06-19)
- Remove reneging_destinations, move to a jockeying routing option within the routing objects.
- 3.2.0 (2024-05-07)
- System capacity implemented.
- Server schedules objects now take numbers_of_servers and shift_end_dates keywards, instead of schedule.
- Server schedules and slotted services can be offset.
- Added a GroupedNodePopulation tracker.
- Restructures documentation, adds more guides, and updates reference pages.
- Routing objects implemented: TransitionMatrix object, ProcessBased object, FlexibleProcessBased object, NetworkRouting object, Direct object, Leave object, Probabilistic object, JoinShortestQueue object, LoadBalancing object
- Added reroute as an option for interrupted preemptive services.
- 3.1.4 (2024-04-09)
- Fix bug where Individual's server isn't reset after a slotted service.
- 3.1.3 (2024-04-08)
- Allows class methods as generator functions for process-based routing.
- 3.1.2 (2024-04-08)
- Fix bug when using Mixture distribution.
- 3.1.1 (2024-04-04)
- Add a MixtureDistrubution that probabilistically chooses from a number of other distributions to sample from.
- Baulking functions now take the simulation, current node, and current individual.
- Service disciplines now take the current time.
- Service disciplines now called when a customer arrives (allowing for lingering customers).
- Distributions have parameters in their reprs.
- Adding type hints and better doctrings.
- 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.
- Internal refactoring.
- 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.
- Performance improvements.
- 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)
- Large refactor:
- 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)
- Batch arrivals.
- 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.
- Add CONTRIBUTING.rst.
- 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)
- Performance improvements.
- 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 AUTHORS.rst.
- 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)
- Re-factor inputs.
- 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)
- Exactness implemented.
- 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.
- Tidy ups.
- v0.0.3 (2016-02-09)
- Arrival distributions.
- MMC options removed.
- Fix server schedule bugs.
- v0.0.2 (2016-01-06)
- Some kwargs optional.
- Hypothesis tests.
- Minor enhancements.
- v0.0.1 (2015-12-14)
- Initial release.
- v0.0.1dev (2015-12-14)
- Initial release (dev).