PRETTI Example 1

Copy and paste these into the PRETTI app for a working example.

This example is from http://en.wikipedia.org/wiki/Program_evaluation_and_review_technique_%28PERT%29#Implementation.

P1 Table: PRETTI example scenario 1

name,value
activity_table_name,PRETTI Example 1
time_est_short,5
time_est_median,8
time_est_long,12
time_probability_point,0.5

P2 Table: PRETTI Example 1 (tasks)

activity_ref,time_est_short,time_est_median,time_est_long,time_ext,dependent_tasks
A,2,4,6,4.0,
B,3,5,9,5.33,
C,4,5,7,5.17,A
D,4,6,10,6.33,A
E,4,5,7,5.17,B C
F,3,4,8,4.5,D
G,3,5,8,5.17,E

P3 Table: Task Types

(not used)

DC Tables: Distribution Curves

(not used)

P1 table with some optional settings

This shows some optional settings added to P1.
pert_omp,strict tells PRETTI to use PERT's expected time formula.
precision,0.001 sets the general display precision.
tprecision,0.01 sets the display precision for time variables.

name: PRETTI example scenario 1
 tid: 10412
namevalue
activity_table_namePRETTI Example 1
activity_table_tid10352
time_est_short5
time_est_median8
time_est_long12
time_probability_point0.5
db_formatexpand
pert_ompstrict
precision0.001
tprecision0.01

P4 is the result table. See glossary for acronym meanings and faqs.

PRETTI Example 1.p4

name: PRETTI Example 1.p4
 tid: 10415

Computation report

path_1path_2path_3
A
t:4.0
tw:4.0
tn:4.0
fw:0.0
 c:1.0
cw:1.0
cn:1.0
d:()
B
t:5.33
tw:5.33
tn:5.33
fw:0.0
 c:1.0
cw:1.0
cn:1.0
d:()
A
t:4.0
tw:4.0
tn:4.0
fw:0.0
 c:1.0
cw:1.0
cn:1.0
d:()
C
t:5.17
tw:9.17
tn:9.17
fw:0.0
 c:1.0
cw:2.0
cn:2.0
d:(A)
E
t:5.17
tw:10.5
tn:14.33
fw:3.83
 c:1.0
cw:2.0
cn:4.0
d:(B C)
D
t:6.33
tw:10.33
tn:10.33
fw:0.0
 c:1.0
cw:2.0
cn:2.0
d:(A)
E
t:5.17
tw:14.33
tn:14.33
fw:0.0
 c:1.0
cw:3.0
cn:4.0
d:(B C)
G
t:5.17
tw:15.67
tn:19.5
fw:3.83
 c:1.0
cw:3.0
cn:5.0
d:(E)
F
t:4.5
tw:14.83
tn:14.83
fw:0.0
 c:1.0
cw:3.0
cn:3.0
d:(D)
G
t:5.17
tw:19.5
tn:19.5
fw:0.0
 c:1.0
cw:4.0
cn:5.0
d:(E)
  

Scenario report for PRETTI example scenario 1: scenario_name PRETTI Example 1 , cp_duration_at_pm 19.500000000000004 , cp_cost_pm 4.0 , max_act_count_per_track 4 , time_probability_point 0.5 , cost_probability_point 0.5 , setup_time 0 , main_processing_time 0 seconds , time/date finished processing 2014 Aug 02 21:30:17 , _tDcSource 3.1 , _cDcSource 6 , precision 0.001 , tprecision 0.01 , cprecision 0.001 , color_mask_sig_idx 3 , color_mask_oth_idx 5 , colorswap_p 0