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criticalpath Package

criticalpath package is an R implementation of the Critical Path Method (CPM) in R with R6 library. CPM is a method used to estimate the minimum project duration and determine the amount of scheduling flexibility on the logical network paths within the schedule model. The flexibility is in terms of early start, early finish, late start, late finish, total float and free float. Beside, it permits to quantify the complexity of network diagram through the analysis of topological indicators. Finally, it permits to change the activities duration to perform what-if scenario analysis.

With this package, you can calculate the following CPM parameters:

  • Schedule duration
  • Early start and finish date of each activity
  • Late start and finish date of each activity
  • Critical activities
  • Critical path
  • Total float and free float
  • Gantt Matrix
  • What-if scenario analysis
  • Topological indicators

The aim of this package is to apply critical path method, for Project Manager and Researches make “What if?” scenario analysis or experiments with CPM parameters.

Installation

You can install the released version of criticalpath from CRAN with:

#install.packages("criticalpath")

Example

To create a schedule:

library(criticalpath)

sch <- sch_new() %>% 
  sch_title("Project 1: Cost Information System") %>% 
  sch_reference("VANHOUCKE, Mario.
Integrated project management and control:
  first comes the theory, then the practice.
  Gent: Springer, 2014, p. 6") %>% 
  sch_add_activities(
    id        = 1:17,
    name      = paste("a", as.character(1:17), sep=""),
    duration  = c(1L,2L,2L,4L,3L,3L,3L,2L,1L,1L,2L,1L,1L,1L,1L,2L,1L)
  ) %>% 
  sch_add_relations(
    from = c(1L, 1L, 2L, 2L, 2L, 3L, 3L, 3L,  3L,  4L,  5L,  6L,
           7L,  8L,  9L, 10L, 11L, 11L, 12L, 12L, 13L, 13L, 14L, 14L, 15L, 15L),
    to   = c(2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 11L, 11L,
           12L, 13L, 14L, 15L, 16L, 17L, 16L, 17L, 16L, 17L, 16L, 17L, 16L, 17L)
  ) %>% 
  sch_plan()

What is the schedule duration?

sch_duration(sch)
#> [1] 11

Which activities are critical?

sch_critical_activities(sch)
#> # A tibble: 5 x 14
#>      id name  duration milestone critical early_start early_finish late_start
#>   <int> <chr>    <int> <lgl>     <lgl>          <int>        <int>      <int>
#> 1     1 a1           1 FALSE     TRUE               0            1          0
#> 2     2 a2           2 FALSE     TRUE               1            3          1
#> 3     4 a4           4 FALSE     TRUE               3            7          3
#> 4    11 a11          2 FALSE     TRUE               7            9          7
#> 5    16 a16          2 FALSE     TRUE               9           11          9
#> # ... with 6 more variables: late_finish <int>, total_float <int>,
#> #   free_float <int>, progr_level <int>, regr_level <int>, topo_float <int>

What is the critical relations?

sch_critical_relations(sch)
#> # A tibble: 4 x 8
#>    from    to type    lag critical   ord i_from  i_to
#>   <int> <int> <chr> <int> <lgl>    <int>  <int> <int>
#> 1     1     2 FS        0 TRUE         1      1     2
#> 2     2     4 FS        0 TRUE         3      2     4
#> 3     4    11 FS        0 TRUE        10      4    11
#> 4    11    16 FS        0 TRUE        17     11    16

More information

CRAN - Package criticalpath

criticalpath Page

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Version

Install

install.packages('criticalpath')

Monthly Downloads

337

Version

0.2.1

License

MIT + file LICENSE

Issues

Pull Requests

Stars

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Last Published

March 13th, 2022

Functions in criticalpath (0.2.1)

sch_add_relation

Add Relation
sch_add_activities_tibble

Add Activities Tibble
%<>%

Pipe assign operator
sch_add_relations

Add Relations
sch_activities

Activities
sch_add_activity

Add Activity
sch_add_activities

Add Activities
Schedule

R6 Class Representing a Schedule
criticalpath

criticalpath: Critical Path Method R Implementation
%>%

Pipe operator
sch_gantt_matrix

Gantt Matrix
sch_change_activities_duration

Change Activities Duration
sch_all_successors

All Successors
sch_all_predecessors

All Predecessors
sch_add_relations_tibble

Add Relations Tibble
sch_critical_activities

Critical Activities
sch_critical_relations

Critical Relations
sch_evaluate_redundancy

Evaluate Redundancy
sch_duration

Duration
sch_has_any_activity

Has Any Activity
sch_has_any_relation

Has Any Relation
sch_non_critical_activities

Non Critical Activities
sch_non_critical_relations

Non Critical Relations
sch_nr_activities

Nr. of Activities
sch_nr_relations

Nr. of Relations
sch_get_activity

Get Activity
sch_is_redundant

Is Redundant
sch_plan

Plan Schedule
sch_topoi_tf

TF Topological Float Indicator
sch_topoi_sp

SP Serial or Parallel Topological Indicator
sch_predecessors

Predecessors
sch_topoi_la

LA Length of Arcs Topological Indicator
sch_topoi_ad

AD Activity Distribution Topological Indicator
sch_successors

Successors
sch_title

Title
sch_new

New Schedule
sch_relations

Relations
sch_reference

Reference
sch_validate

Validate Schedule
sch_xy_gantt_matrix

XY Gantt Matrix