Errors in Practical Reliability Engineering (4^th ed),

as of 3 March 2006.

All corrected in Revised 2006 reprint, except where indicated *

Many thanks to all who have submitted corrections, particularly Al Washburn.

p35: equation 2.20 should start R(x)=1-F(x), not R(x)=1-f(x).

p44: line 6: delete “u and v are……values by:”

Line 9: change to : “For maximum values”.

Line 11: For minimum values”.

Lines 10, 12, 13: replace u and v with s and µ, respectively.

p47: For Extreme value, under “Type 1”, insert “(shown)”

Ditto, replace the two equations under “Probability density function” with those in Equations 2.33 and 2.34 (p.44), but replacing x with t.

Ditto, the maximum value R(t) should be 1 minus the expression that is shown.

p143. In table of main effects: change the signs of all the values in column 5. Change values in column after = sign to: 4,2,3,2,1,-4,1 .

*p134. Seventh line from bottom: delete “test combination”, insert “temperature”.

p144. change values to: 512, 64,288,64,32,512,32

Change following sentence to: “Therefore ….. components A and F are ….., with component C also …”

*p145: Table 5.17: change values 341 and 109 to 34 and 10, respectively.

p166, 167. Eqns. 6.5, 6.6,6.7,6.8: change the left-hand-side to R_SYS.

p170/171:

Table 6.1 is hard to read. It is spread over two pages, but with different row spacing on the two pages. Line up the rows so that they read across.

In the following cells, change the formulas to:

cell (4,6) (row 4, col 6): (m²+ml)/(m²+ml+l²)
cell (5,6): (m³+3m²l+6ml²)/(m³+3m²l+6ml²+6l³)
cell (6,6): (m³+3m²l)/( m³+3m²l+6ml²+6l³)

cell (6,7): last part of formula: mⁱl^n-i

cell (7,4): change R to exp(-lt)
cell (7,6): (m³+m²l+ml²)/( m³+m²l+ml²+l³)

cell (6,5) Change result from 0.53 to 0.31
cell (5,8) change result to 0.9999

cell (6,8) change result to 0.987

p173: (end of Example 6.2): change page 134 to page 190 .

p174: In equations (6.13) and (6.14), in both cases the sum (Σ) should be over j (not i=1) and the product (Π) over i (not j=1) and the upper limit of the product should be n_j (not n)

p181: at the end of the second complete paragraph, change Q1 to A1.

p310: penultimate line: change to “…(a, 1/λ) in Equation 2.28 …”

p311: equation 10.11: substitute (N-i) for (N-1) and 1+(N-i)a for
(N-i)(a+1).

p340: line 7 in Example 12.2: 0.1X10⁸ Nm^-2

p 364: Figure 2.12: refers in two places to q₁. In both cases the reference should be to q_i.

p462: table heading should be "F0.05" (not 0.1).