The Formula

STC created a weighting formula by following the four steps outlined below.

Once you've seen how a weighting formula is developed, you can create one yourself by following these same steps, using the worksheet provided on the next page. That interactive page will work only if you have enabled JavaScript. Otherwise, you can go to our non-interactive page, print it , and fill in the form manually.

But first, take the time to learn how to create a weighting formula step by step.

Step 1 - Factor Formula

STC divided 100% between the factors of Skill, Effort, Responsibility and Working Conditions, as shown below.

Chart # 2
Factor Formula (100% divided between 4 factors)
Factors	Percentages	Points
Skill	35%	350
Effort	20%	200
Responsibility	35%	350
Working Conditions	10%	100
Total Value for the System	100%	1000

Step 2 - Subfactor Formula

STC broke down this weighting formula further by dividing 100% between the 10 subfactors, as shown below.

Chart # 3
Subfactor Formula (100% divided between 10 subfactors)
Factors and Subfactors	Percentages	Points
Skill	35%	350
Knowledge	15%	150
Interpersonal skills/Contacts	12%	120
Problem-solving/Judgement	8%	80
Effort	20%	200
Mental Effort	12%	120
Physical Effort	8%	80
Responsibility	35%	350
Personnel, Policies and Practices	12%	120
Information Resources	10%	100
Financial Resources	8%	80
Material Resources	5%	50
Working Conditions	10%	100
Environment	10%	100
Total value for the system	100%	1000

Step 3 - Levels Formula

The Committee decided on the number of levels for each subfactor, then determined the points for each level by dividing the total number of points assigned to each subfactor by the number of levels. For example, the 120 points given to Mental Effort was divided by its number of levels (5). Each level was then assigned 24 points. For example, 24 points x 2 levels = 48 points, or 24 points x 5 levels = 120 points. The result of the calculation, from Level 1 to 5 is: 24, 48, 72, 96, and 120 points, as shown below.

Chart # 4
Levels Formula (percentages divided between 4 to 6 levels)

Subfactors	Weight	Points	Points for Levels
Skill (35% divided between three subfactors)
			1	2	3	4	5	6
Knowledge	15%	150	30	60	90	120	150
Interpersonal Skills/ Contacts	12%	120	24	48	72	96	120
Problem-Solving/ Judgement	8%	80	16	32	48	64	80

Subfactors	Weight	Points	Points for Levels
Effort (20% divided between two subfactors)
			1	2	3	4	5	6
Mental Effort	12%	120	24	48	72	96	120
Physical Effort	8%	80	16	32	48	64	80

Subfactors	Weight	Points	Points for Levels
Responsibility (35% divided between four subfactors)
			1	2	3	4	5	6
Personnel/ Policies/ Practices	12%	120	20	40	60	80	100	120
Information Resources	10%	100	20	40	60	80	100
Financial Resources	8%	80	20	40	60	80
Material Resources	5%	50	10	20	30	40	50

Subfactors	Weight	Points	Points for Levels
Working Conditions (10% applied to one subfactor)
			1	2	3	4	5	6
Environment	10%	100	20	40	60	80	100

Step 4 - Expanded Formula

The Committee tested the above formula and found that some job classes did not fit comfortably in some subfactors' levels but fell somewhere in between two levels. For example, if a job class fits best in Level 2 under the Interpersonal Skills/Contacts subfactor, but on occasion the person doing the job has to provide explanations on complex material, the job class may be scored properly at Level 2 +. STC's Committee elected to expand their formula using " + " and " - " shadings to achieve a more exact rating for these job classes.

Shading a formula with a " + " and " - " factor

To calculate points for the " + "or " - " factor, divide the number of points allotted to each level by 3, and add or subtract that amount.

Example:

If each level of the Communications skills subfactor had 25 points, divide 25 by 3. The " + " or " - " factor is 8.3 points. Add or subtract that amount from the appropriate level. You will need to round off your numbers.

The final weighting formula calculations for STC's head office job classes is shown in Chart # 5 below.

Chart # 5
Expanded Formula
Point Values with " + " and " - "Shadings
	KN	PS	IS	ME	PE	PPP	FR	IR	MR	ENV
1	30	24	16	24	16	20	20	20	10	20
1 +	40	32	21	32	21	27	27	27	13	27
2 -	50	40	27	40	27	33	33	33	17	33
2	60	48	32	48	32	40	40	40	20	40
2 +	70	56	37	56	37	47	47	47	23	47
3 -	80	64	43	64	43	53	53	53	27	53
3	90	72	48	72	48	60	60	60	30	60
3 +	100	80	53	80	53	67	67	67	33	67
4 -	110	88	59	88	59	73	73	73	37	73
4	120	96	64	96	64	80	80	80	40	80
4 +	130	104	69	104	69	87	87		43	87
5 -	140	112	75	112	75	93	93		47	93
5	150	120	80	120	80	100	100		50	100
5 +						107
6 -						113
6						120

KN	Knowledge
PS	Problem-Solving/Judgement
IS	Interpersonal Skills/Contacts
ME	Mental Effort
PE	Physical Effort
PPP	Responsibility for Personnel, Policies and Practices
FR	Responsibility for Financial Resources
IR	Responsibility for Information Resources
MR	Responsibility for Material Resources
ENV	Environment

Create a weighting formula

Now you've seen how weighting is done, you can create a formula yourself. The interactive worksheet on the next page will allow you to divide 100% (1000 points) between the factors of skill, effort, responsibility and working conditions. You can also divide percentages between subfactors, choose the number of levels you want, and divide the percentages further between the levels.

Last modified: April 7, 2008